diff --git a/regtest/basic/rt67-mpi/COLVAR.reference b/regtest/basic/rt67-mpi/COLVAR.reference
new file mode 100644
index 0000000000000000000000000000000000000000..7d00a355feca39f9bec7a530282a1b70349104d2
--- /dev/null
+++ b/regtest/basic/rt67-mpi/COLVAR.reference
@@ -0,0 +1,26 @@
+#! FIELDS time phi psi metad.bias metad.rbias metad.rct
+#! SET min_phi -pi
+#! SET max_phi pi
+#! SET min_psi -pi
+#! SET max_psi pi
+ 0.000000  -1.2379   0.8942   0.0000   0.0000   0.0000
+ 1.000000  -1.4839   1.0482   0.0000   0.0000   0.0089
+ 2.000000  -1.3243   0.6055   0.0753   0.0664   0.0184
+ 3.000000  -1.3340   0.6808   1.2805   1.2622   0.0308
+ 4.000000  -1.4613   1.3921   0.2720   0.2412   0.0410
+ 5.000000  -1.2202   0.7871   1.7491   1.7081   0.0562
+ 6.000000  -1.3883   1.0005   2.1113   2.0551   0.0743
+ 7.000000  -1.5481   1.3453   1.6160   1.5418   0.0893
+ 8.000000  -1.8429   1.3293   0.6692   0.5800   0.1025
+ 9.000000  -2.2424   2.6059   0.0000  -0.1025   0.1109
+ 10.000000  -1.1482   0.5350   1.8435   1.7326   0.1281
+ 11.000000  -1.7580   2.0752   0.0012  -0.1269   0.1367
+ 12.000000  -1.3186   3.0997   0.0000  -0.1367   0.1443
+ 13.000000  -2.9911   2.8991   0.0000  -0.1443   0.1524
+ 14.000000  -1.4112   0.0028   0.0285  -0.1239   0.1614
+ 15.000000  -2.5995   2.6683   0.3230   0.1616   0.1714
+ 16.000000  -1.4608   0.2622   0.9676   0.7962   0.1856
+ 17.000000  -1.3791   1.1576   3.0484   2.8628   0.2090
+ 18.000000  -1.6771   0.9078   1.5947   1.3857   0.2309
+ 19.000000  -1.5241   1.2623   4.1823   3.9513   0.2607
+ 20.000000  -1.1997   0.9529   3.1902   2.9295   0.2924
diff --git a/regtest/basic/rt67-mpi/Makefile b/regtest/basic/rt67-mpi/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..3703b27cea227aa053fb6d1d73f861e4384dbcee
--- /dev/null
+++ b/regtest/basic/rt67-mpi/Makefile
@@ -0,0 +1 @@
+include ../../scripts/test.make
diff --git a/regtest/basic/rt67-mpi/config b/regtest/basic/rt67-mpi/config
new file mode 100644
index 0000000000000000000000000000000000000000..921aabbd4854d7952ddc761dddbee9701e38a90c
--- /dev/null
+++ b/regtest/basic/rt67-mpi/config
@@ -0,0 +1,4 @@
+mpiprocs=4
+type=driver
+# this is to test a different name
+arg="--plumed plumed.dat --trajectory-stride 500 --timestep 0.002 --igro traj.gro"
diff --git a/regtest/basic/rt67-mpi/plumed.dat b/regtest/basic/rt67-mpi/plumed.dat
new file mode 100644
index 0000000000000000000000000000000000000000..6eed71d034826ddb7913b5f77f947c68276f6605
--- /dev/null
+++ b/regtest/basic/rt67-mpi/plumed.dat
@@ -0,0 +1,30 @@
+phi:   TORSION ATOMS=5,7,9,15     NOPBC
+psi:   TORSION ATOMS=7,9,15,17    NOPBC
+
+METAD ...
+ ARG=phi,psi
+ SIGMA=0.20,0.20
+ HEIGHT=1.20
+ BIASFACTOR=10
+ TEMP=300.0
+ PACE=500
+ LABEL=metad
+ FILE=HILLS
+ GRID_MIN=-pi,-pi
+ GRID_MAX=pi,pi
+ GRID_BIN=150,150
+ REWEIGHTING_NGRID=150,150
+ REWEIGHTING_NHILLS=1
+... METAD
+
+PRINT ...
+ ARG=phi,psi,metad.bias,metad.rbias,metad.rct
+ STRIDE=500
+ FILE=COLVAR
+ FMT=%8.4f
+... PRINT
+
+
+
+
+
diff --git a/regtest/basic/rt67-mpi/traj.gro b/regtest/basic/rt67-mpi/traj.gro
new file mode 100644
index 0000000000000000000000000000000000000000..c1c387a0144ec8021b9e5b0453be534f2ca906e2
--- /dev/null
+++ b/regtest/basic/rt67-mpi/traj.gro
@@ -0,0 +1,525 @@
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   0.00000
+   22
+    1ACE   HH31    1   1.474   1.585   1.200
+    1ACE    CH3    2   1.483   1.508   1.277
+    1ACE   HH32    3   1.476   1.561   1.372
+    1ACE   HH33    4   1.578   1.455   1.278
+    1ACE      C    5   1.353   1.428   1.279
+    1ACE      O    6   1.263   1.449   1.357
+    2ALA      N    7   1.343   1.328   1.191
+    2ALA      H    8   1.415   1.321   1.120
+    2ALA     CA    9   1.233   1.239   1.159
+    2ALA     HA   10   1.144   1.302   1.155
+    2ALA     CB   11   1.244   1.182   1.013
+    2ALA    HB1   12   1.341   1.136   0.992
+    2ALA    HB2   13   1.159   1.117   0.994
+    2ALA    HB3   14   1.242   1.265   0.942
+    2ALA      C   15   1.207   1.140   1.271
+    2ALA      O   16   1.214   1.017   1.241
+    3NME      N   17   1.191   1.177   1.398
+    3NME      H   18   1.192   1.275   1.421
+    3NME    CH3   19   1.189   1.086   1.518
+    3NME   HH31   20   1.170   0.983   1.487
+    3NME   HH32   21   1.283   1.087   1.574
+    3NME   HH33   22   1.108   1.127   1.578
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   1.00000
+   22
+    1ACE   HH31    1   1.480   1.571   1.214
+    1ACE    CH3    2   1.481   1.493   1.289
+    1ACE   HH32    3   1.502   1.528   1.390
+    1ACE   HH33    4   1.551   1.417   1.255
+    1ACE      C    5   1.344   1.432   1.275
+    1ACE      O    6   1.250   1.462   1.345
+    2ALA      N    7   1.342   1.327   1.193
+    2ALA      H    8   1.430   1.313   1.144
+    2ALA     CA    9   1.233   1.244   1.166
+    2ALA     HA   10   1.144   1.307   1.173
+    2ALA     CB   11   1.240   1.189   1.017
+    2ALA    HB1   12   1.327   1.124   1.000
+    2ALA    HB2   13   1.150   1.128   1.005
+    2ALA    HB3   14   1.251   1.267   0.941
+    2ALA      C   15   1.221   1.133   1.271
+    2ALA      O   16   1.217   1.015   1.238
+    3NME      N   17   1.204   1.174   1.395
+    3NME      H   18   1.200   1.275   1.398
+    3NME    CH3   19   1.188   1.089   1.516
+    3NME   HH31   20   1.083   1.086   1.543
+    3NME   HH32   21   1.233   0.990   1.511
+    3NME   HH33   22   1.241   1.141   1.596
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   2.00000
+   22
+    1ACE   HH31    1   1.532   1.520   1.209
+    1ACE    CH3    2   1.478   1.493   1.300
+    1ACE   HH32    3   1.465   1.586   1.356
+    1ACE   HH33    4   1.548   1.426   1.350
+    1ACE      C    5   1.352   1.423   1.279
+    1ACE      O    6   1.252   1.461   1.340
+    2ALA      N    7   1.351   1.326   1.190
+    2ALA      H    8   1.442   1.293   1.160
+    2ALA     CA    9   1.232   1.244   1.160
+    2ALA     HA   10   1.146   1.310   1.151
+    2ALA     CB   11   1.241   1.190   1.016
+    2ALA    HB1   12   1.333   1.132   1.008
+    2ALA    HB2   13   1.160   1.123   0.986
+    2ALA    HB3   14   1.242   1.280   0.955
+    2ALA      C   15   1.203   1.138   1.270
+    2ALA      O   16   1.161   1.021   1.240
+    3NME      N   17   1.230   1.171   1.396
+    3NME      H   18   1.257   1.266   1.417
+    3NME    CH3   19   1.217   1.090   1.512
+    3NME   HH31   20   1.144   1.011   1.493
+    3NME   HH32   21   1.307   1.029   1.526
+    3NME   HH33   22   1.212   1.146   1.605
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   3.00000
+   22
+    1ACE   HH31    1   1.439   1.582   1.175
+    1ACE    CH3    2   1.474   1.516   1.254
+    1ACE   HH32    3   1.480   1.585   1.338
+    1ACE   HH33    4   1.569   1.465   1.242
+    1ACE      C    5   1.364   1.419   1.280
+    1ACE      O    6   1.277   1.446   1.367
+    2ALA      N    7   1.358   1.323   1.194
+    2ALA      H    8   1.443   1.313   1.140
+    2ALA     CA    9   1.235   1.243   1.164
+    2ALA     HA   10   1.150   1.310   1.170
+    2ALA     CB   11   1.240   1.197   1.019
+    2ALA    HB1   12   1.316   1.119   1.016
+    2ALA    HB2   13   1.145   1.157   0.982
+    2ALA    HB3   14   1.279   1.276   0.955
+    2ALA      C   15   1.201   1.137   1.272
+    2ALA      O   16   1.172   1.021   1.232
+    3NME      N   17   1.218   1.166   1.402
+    3NME      H   18   1.240   1.259   1.434
+    3NME    CH3   19   1.186   1.086   1.518
+    3NME   HH31   20   1.225   0.984   1.527
+    3NME   HH32   21   1.193   1.134   1.616
+    3NME   HH33   22   1.081   1.058   1.509
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   4.00000
+   22
+    1ACE   HH31    1   1.549   1.508   1.196
+    1ACE    CH3    2   1.500   1.486   1.290
+    1ACE   HH32    3   1.487   1.571   1.357
+    1ACE   HH33    4   1.563   1.415   1.343
+    1ACE      C    5   1.362   1.425   1.270
+    1ACE      O    6   1.265   1.465   1.340
+    2ALA      N    7   1.349   1.324   1.182
+    2ALA      H    8   1.432   1.287   1.138
+    2ALA     CA    9   1.221   1.249   1.168
+    2ALA     HA   10   1.138   1.318   1.184
+    2ALA     CB   11   1.201   1.194   1.025
+    2ALA    HB1   12   1.276   1.117   1.005
+    2ALA    HB2   13   1.096   1.165   1.014
+    2ALA    HB3   14   1.229   1.265   0.947
+    2ALA      C   15   1.217   1.141   1.275
+    2ALA      O   16   1.234   1.024   1.243
+    3NME      N   17   1.183   1.174   1.400
+    3NME      H   18   1.184   1.274   1.412
+    3NME    CH3   19   1.187   1.078   1.509
+    3NME   HH31   20   1.248   0.990   1.490
+    3NME   HH32   21   1.220   1.120   1.604
+    3NME   HH33   22   1.088   1.035   1.527
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   5.00000
+   22
+    1ACE   HH31    1   1.449   1.585   1.168
+    1ACE    CH3    2   1.479   1.518   1.248
+    1ACE   HH32    3   1.523   1.577   1.328
+    1ACE   HH33    4   1.565   1.461   1.213
+    1ACE      C    5   1.364   1.422   1.284
+    1ACE      O    6   1.305   1.438   1.389
+    2ALA      N    7   1.347   1.326   1.187
+    2ALA      H    8   1.423   1.328   1.122
+    2ALA     CA    9   1.226   1.241   1.162
+    2ALA     HA   10   1.139   1.308   1.162
+    2ALA     CB   11   1.236   1.193   1.023
+    2ALA    HB1   12   1.314   1.117   1.012
+    2ALA    HB2   13   1.137   1.167   0.986
+    2ALA    HB3   14   1.273   1.278   0.966
+    2ALA      C   15   1.195   1.133   1.268
+    2ALA      O   16   1.173   1.016   1.239
+    3NME      N   17   1.204   1.175   1.393
+    3NME      H   18   1.211   1.275   1.403
+    3NME    CH3   19   1.188   1.090   1.513
+    3NME   HH31   20   1.089   1.044   1.509
+    3NME   HH32   21   1.267   1.014   1.509
+    3NME   HH33   22   1.189   1.145   1.607
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   6.00000
+   22
+    1ACE   HH31    1   1.517   1.511   1.181
+    1ACE    CH3    2   1.490   1.488   1.284
+    1ACE   HH32    3   1.482   1.582   1.339
+    1ACE   HH33    4   1.569   1.421   1.316
+    1ACE      C    5   1.359   1.414   1.282
+    1ACE      O    6   1.272   1.447   1.358
+    2ALA      N    7   1.351   1.320   1.186
+    2ALA      H    8   1.434   1.297   1.133
+    2ALA     CA    9   1.220   1.251   1.159
+    2ALA     HA   10   1.139   1.323   1.167
+    2ALA     CB   11   1.220   1.194   1.018
+    2ALA    HB1   12   1.298   1.120   1.003
+    2ALA    HB2   13   1.120   1.158   0.994
+    2ALA    HB3   14   1.224   1.286   0.960
+    2ALA      C   15   1.201   1.139   1.270
+    2ALA      O   16   1.190   1.022   1.239
+    3NME      N   17   1.203   1.178   1.393
+    3NME      H   18   1.207   1.277   1.409
+    3NME    CH3   19   1.211   1.102   1.515
+    3NME   HH31   20   1.111   1.064   1.534
+    3NME   HH32   21   1.275   1.017   1.492
+    3NME   HH33   22   1.264   1.151   1.597
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   7.00000
+   22
+    1ACE   HH31    1   1.483   1.590   1.185
+    1ACE    CH3    2   1.505   1.501   1.245
+    1ACE   HH32    3   1.538   1.533   1.344
+    1ACE   HH33    4   1.580   1.430   1.209
+    1ACE      C    5   1.379   1.418   1.267
+    1ACE      O    6   1.298   1.443   1.349
+    2ALA      N    7   1.360   1.320   1.187
+    2ALA      H    8   1.426   1.297   1.114
+    2ALA     CA    9   1.224   1.253   1.180
+    2ALA     HA   10   1.147   1.326   1.205
+    2ALA     CB   11   1.174   1.215   1.037
+    2ALA    HB1   12   1.245   1.152   0.983
+    2ALA    HB2   13   1.084   1.154   1.032
+    2ALA    HB3   14   1.153   1.311   0.992
+    2ALA      C   15   1.212   1.141   1.280
+    2ALA      O   16   1.219   1.022   1.244
+    3NME      N   17   1.191   1.176   1.408
+    3NME      H   18   1.207   1.275   1.423
+    3NME    CH3   19   1.162   1.068   1.509
+    3NME   HH31   20   1.229   0.982   1.503
+    3NME   HH32   21   1.162   1.109   1.610
+    3NME   HH33   22   1.056   1.044   1.499
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   8.00000
+   22
+    1ACE   HH31    1   1.576   1.425   1.169
+    1ACE    CH3    2   1.523   1.455   1.260
+    1ACE   HH32    3   1.547   1.556   1.294
+    1ACE   HH33    4   1.566   1.393   1.338
+    1ACE      C    5   1.385   1.422   1.255
+    1ACE      O    6   1.308   1.499   1.305
+    2ALA      N    7   1.346   1.311   1.189
+    2ALA      H    8   1.419   1.248   1.159
+    2ALA     CA    9   1.210   1.260   1.193
+    2ALA     HA   10   1.139   1.326   1.242
+    2ALA     CB   11   1.152   1.252   1.051
+    2ALA    HB1   12   1.230   1.210   0.987
+    2ALA    HB2   13   1.066   1.185   1.052
+    2ALA    HB3   14   1.127   1.354   1.024
+    2ALA      C   15   1.206   1.136   1.282
+    2ALA      O   16   1.195   1.023   1.229
+    3NME      N   17   1.210   1.152   1.420
+    3NME      H   18   1.221   1.243   1.463
+    3NME    CH3   19   1.185   1.048   1.518
+    3NME   HH31   20   1.195   0.948   1.475
+    3NME   HH32   21   1.261   1.070   1.593
+    3NME   HH33   22   1.088   1.064   1.565
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   9.00000
+   22
+    1ACE   HH31    1   1.515   1.474   1.040
+    1ACE    CH3    2   1.535   1.461   1.147
+    1ACE   HH32    3   1.561   1.560   1.184
+    1ACE   HH33    4   1.612   1.386   1.165
+    1ACE      C    5   1.406   1.430   1.217
+    1ACE      O    6   1.361   1.502   1.307
+    2ALA      N    7   1.345   1.316   1.190
+    2ALA      H    8   1.384   1.254   1.121
+    2ALA     CA    9   1.217   1.277   1.242
+    2ALA     HA   10   1.187   1.348   1.319
+    2ALA     CB   11   1.111   1.278   1.134
+    2ALA    HB1   12   1.129   1.198   1.062
+    2ALA    HB2   13   1.018   1.269   1.189
+    2ALA    HB3   14   1.121   1.372   1.079
+    2ALA      C   15   1.217   1.133   1.309
+    2ALA      O   16   1.293   1.044   1.265
+    3NME      N   17   1.132   1.116   1.408
+    3NME      H   18   1.076   1.195   1.437
+    3NME    CH3   19   1.112   1.003   1.490
+    3NME   HH31   20   1.156   0.910   1.456
+    3NME   HH32   21   1.153   1.026   1.588
+    3NME   HH33   22   1.005   0.985   1.500
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  10.00000
+   22
+    1ACE   HH31    1   1.536   1.485   1.135
+    1ACE    CH3    2   1.521   1.460   1.240
+    1ACE   HH32    3   1.528   1.557   1.289
+    1ACE   HH33    4   1.602   1.397   1.276
+    1ACE      C    5   1.385   1.401   1.261
+    1ACE      O    6   1.341   1.416   1.373
+    2ALA      N    7   1.322   1.332   1.167
+    2ALA      H    8   1.364   1.316   1.076
+    2ALA     CA    9   1.190   1.273   1.177
+    2ALA     HA   10   1.125   1.352   1.216
+    2ALA     CB   11   1.134   1.230   1.038
+    2ALA    HB1   12   1.167   1.128   1.016
+    2ALA    HB2   13   1.026   1.238   1.046
+    2ALA    HB3   14   1.174   1.287   0.953
+    2ALA      C   15   1.183   1.157   1.283
+    2ALA      O   16   1.111   1.061   1.259
+    3NME      N   17   1.264   1.157   1.396
+    3NME      H   18   1.320   1.241   1.405
+    3NME    CH3   19   1.264   1.070   1.510
+    3NME   HH31   20   1.163   1.057   1.548
+    3NME   HH32   21   1.311   0.974   1.487
+    3NME   HH33   22   1.326   1.109   1.592
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  11.00000
+   22
+    1ACE   HH31    1   1.607   1.359   1.178
+    1ACE    CH3    2   1.535   1.442   1.176
+    1ACE   HH32    3   1.521   1.470   1.072
+    1ACE   HH33    4   1.569   1.533   1.224
+    1ACE      C    5   1.402   1.412   1.242
+    1ACE      O    6   1.368   1.454   1.350
+    2ALA      N    7   1.319   1.332   1.177
+    2ALA      H    8   1.363   1.279   1.103
+    2ALA     CA    9   1.194   1.289   1.231
+    2ALA     HA   10   1.153   1.355   1.308
+    2ALA     CB   11   1.092   1.300   1.113
+    2ALA    HB1   12   1.137   1.243   1.032
+    2ALA    HB2   13   1.001   1.243   1.131
+    2ALA    HB3   14   1.070   1.405   1.095
+    2ALA      C   15   1.198   1.143   1.290
+    2ALA      O   16   1.237   1.057   1.213
+    3NME      N   17   1.171   1.126   1.422
+    3NME      H   18   1.164   1.213   1.472
+    3NME    CH3   19   1.200   1.009   1.496
+    3NME   HH31   20   1.118   0.938   1.493
+    3NME   HH32   21   1.284   0.953   1.454
+    3NME   HH33   22   1.230   1.031   1.598
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  12.00000
+   22
+    1ACE   HH31    1   1.491   1.569   1.138
+    1ACE    CH3    2   1.511   1.462   1.134
+    1ACE   HH32    3   1.614   1.449   1.166
+    1ACE   HH33    4   1.495   1.444   1.028
+    1ACE      C    5   1.416   1.394   1.229
+    1ACE      O    6   1.445   1.392   1.345
+    2ALA      N    7   1.299   1.357   1.181
+    2ALA      H    8   1.278   1.358   1.082
+    2ALA     CA    9   1.196   1.301   1.267
+    2ALA     HA   10   1.185   1.364   1.355
+    2ALA     CB   11   1.063   1.319   1.182
+    2ALA    HB1   12   1.057   1.248   1.100
+    2ALA    HB2   13   0.976   1.288   1.240
+    2ALA    HB3   14   1.037   1.423   1.161
+    2ALA      C   15   1.226   1.161   1.304
+    2ALA      O   16   1.317   1.094   1.258
+    3NME      N   17   1.135   1.110   1.387
+    3NME      H   18   1.064   1.174   1.419
+    3NME    CH3   19   1.121   0.972   1.429
+    3NME   HH31   20   1.163   0.900   1.358
+    3NME   HH32   21   1.177   0.954   1.520
+    3NME   HH33   22   1.016   0.942   1.428
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  13.00000
+   22
+    1ACE   HH31    1   1.528   1.537   1.077
+    1ACE    CH3    2   1.543   1.448   1.137
+    1ACE   HH32    3   1.634   1.463   1.195
+    1ACE   HH33    4   1.560   1.362   1.072
+    1ACE      C    5   1.421   1.428   1.229
+    1ACE      O    6   1.396   1.520   1.301
+    2ALA      N    7   1.355   1.314   1.219
+    2ALA      H    8   1.385   1.241   1.156
+    2ALA     CA    9   1.249   1.276   1.311
+    2ALA     HA   10   1.297   1.288   1.409
+    2ALA     CB   11   1.122   1.359   1.284
+    2ALA    HB1   12   1.072   1.325   1.193
+    2ALA    HB2   13   1.053   1.352   1.367
+    2ALA    HB3   14   1.153   1.463   1.275
+    2ALA      C   15   1.204   1.131   1.290
+    2ALA      O   16   1.225   1.070   1.185
+    3NME      N   17   1.131   1.077   1.382
+    3NME      H   18   1.104   1.132   1.463
+    3NME    CH3   19   1.083   0.939   1.380
+    3NME   HH31   20   1.012   0.925   1.298
+    3NME   HH32   21   1.168   0.871   1.372
+    3NME   HH33   22   1.036   0.915   1.475
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  14.00000
+   22
+    1ACE   HH31    1   1.543   1.468   1.123
+    1ACE    CH3    2   1.548   1.443   1.229
+    1ACE   HH32    3   1.566   1.540   1.276
+    1ACE   HH33    4   1.634   1.382   1.257
+    1ACE      C    5   1.420   1.385   1.285
+    1ACE      O    6   1.412   1.375   1.404
+    2ALA      N    7   1.324   1.361   1.200
+    2ALA      H    8   1.345   1.354   1.101
+    2ALA     CA    9   1.189   1.323   1.244
+    2ALA     HA   10   1.163   1.394   1.323
+    2ALA     CB   11   1.094   1.344   1.125
+    2ALA    HB1   12   1.098   1.270   1.045
+    2ALA    HB2   13   0.995   1.352   1.170
+    2ALA    HB3   14   1.120   1.440   1.079
+    2ALA      C   15   1.166   1.169   1.284
+    2ALA      O   16   1.055   1.145   1.330
+    3NME      N   17   1.263   1.077   1.279
+    3NME      H   18   1.356   1.102   1.247
+    3NME    CH3   19   1.246   0.942   1.335
+    3NME   HH31   20   1.142   0.911   1.345
+    3NME   HH32   21   1.293   0.868   1.270
+    3NME   HH33   22   1.292   0.934   1.434
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  15.00000
+   22
+    1ACE   HH31    1   1.508   1.417   1.043
+    1ACE    CH3    2   1.539   1.448   1.143
+    1ACE   HH32    3   1.565   1.553   1.146
+    1ACE   HH33    4   1.630   1.395   1.169
+    1ACE      C    5   1.438   1.410   1.253
+    1ACE      O    6   1.429   1.471   1.356
+    2ALA      N    7   1.348   1.327   1.217
+    2ALA      H    8   1.362   1.285   1.126
+    2ALA     CA    9   1.233   1.289   1.298
+    2ALA     HA   10   1.269   1.295   1.401
+    2ALA     CB   11   1.107   1.379   1.286
+    2ALA    HB1   12   1.057   1.360   1.191
+    2ALA    HB2   13   1.034   1.369   1.366
+    2ALA    HB3   14   1.141   1.482   1.282
+    2ALA      C   15   1.192   1.141   1.266
+    2ALA      O   16   1.220   1.089   1.156
+    3NME      N   17   1.131   1.075   1.364
+    3NME      H   18   1.117   1.126   1.450
+    3NME    CH3   19   1.090   0.931   1.376
+    3NME   HH31   20   1.156   0.880   1.446
+    3NME   HH32   21   0.996   0.929   1.431
+    3NME   HH33   22   1.090   0.874   1.283
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  16.00000
+   22
+    1ACE   HH31    1   1.587   1.386   1.166
+    1ACE    CH3    2   1.554   1.425   1.262
+    1ACE   HH32    3   1.559   1.534   1.266
+    1ACE   HH33    4   1.627   1.390   1.335
+    1ACE      C    5   1.417   1.372   1.300
+    1ACE      O    6   1.390   1.364   1.421
+    2ALA      N    7   1.334   1.344   1.205
+    2ALA      H    8   1.365   1.367   1.111
+    2ALA     CA    9   1.190   1.324   1.235
+    2ALA     HA   10   1.160   1.386   1.319
+    2ALA     CB   11   1.105   1.363   1.112
+    2ALA    HB1   12   1.129   1.297   1.029
+    2ALA    HB2   13   0.999   1.351   1.131
+    2ALA    HB3   14   1.125   1.467   1.088
+    2ALA      C   15   1.162   1.180   1.282
+    2ALA      O   16   1.054   1.128   1.258
+    3NME      N   17   1.261   1.106   1.318
+    3NME      H   18   1.349   1.152   1.336
+    3NME    CH3   19   1.250   0.960   1.324
+    3NME   HH31   20   1.264   0.908   1.229
+    3NME   HH32   21   1.322   0.926   1.399
+    3NME   HH33   22   1.153   0.923   1.357
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  17.00000
+   22
+    1ACE   HH31    1   1.614   1.382   1.173
+    1ACE    CH3    2   1.559   1.432   1.253
+    1ACE   HH32    3   1.547   1.532   1.213
+    1ACE   HH33    4   1.625   1.444   1.339
+    1ACE      C    5   1.426   1.380   1.288
+    1ACE      O    6   1.411   1.348   1.406
+    2ALA      N    7   1.325   1.370   1.200
+    2ALA      H    8   1.341   1.388   1.102
+    2ALA     CA    9   1.189   1.318   1.239
+    2ALA     HA   10   1.170   1.358   1.338
+    2ALA     CB   11   1.084   1.388   1.158
+    2ALA    HB1   12   1.113   1.369   1.055
+    2ALA    HB2   13   0.994   1.336   1.189
+    2ALA    HB3   14   1.075   1.493   1.186
+    2ALA      C   15   1.170   1.163   1.252
+    2ALA      O   16   1.097   1.103   1.171
+    3NME      N   17   1.235   1.099   1.349
+    3NME      H   18   1.305   1.153   1.399
+    3NME    CH3   19   1.220   0.964   1.393
+    3NME   HH31   20   1.315   0.912   1.406
+    3NME   HH32   21   1.168   0.953   1.489
+    3NME   HH33   22   1.178   0.897   1.318
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  18.00000
+   22
+    1ACE   HH31    1   1.555   1.419   1.126
+    1ACE    CH3    2   1.554   1.431   1.235
+    1ACE   HH32    3   1.554   1.535   1.267
+    1ACE   HH33    4   1.638   1.381   1.283
+    1ACE      C    5   1.423   1.378   1.292
+    1ACE      O    6   1.416   1.347   1.409
+    2ALA      N    7   1.322   1.351   1.211
+    2ALA      H    8   1.350   1.370   1.115
+    2ALA     CA    9   1.185   1.318   1.251
+    2ALA     HA   10   1.171   1.358   1.352
+    2ALA     CB   11   1.091   1.400   1.149
+    2ALA    HB1   12   1.059   1.346   1.060
+    2ALA    HB2   13   1.008   1.443   1.205
+    2ALA    HB3   14   1.154   1.480   1.109
+    2ALA      C   15   1.163   1.166   1.255
+    2ALA      O   16   1.060   1.108   1.214
+    3NME      N   17   1.255   1.102   1.328
+    3NME      H   18   1.335   1.159   1.354
+    3NME    CH3   19   1.246   0.964   1.369
+    3NME   HH31   20   1.154   0.913   1.344
+    3NME   HH32   21   1.323   0.899   1.327
+    3NME   HH33   22   1.251   0.953   1.477
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  19.00000
+   22
+    1ACE   HH31    1   1.559   1.326   1.133
+    1ACE    CH3    2   1.552   1.413   1.200
+    1ACE   HH32    3   1.538   1.504   1.142
+    1ACE   HH33    4   1.631   1.428   1.273
+    1ACE      C    5   1.426   1.375   1.280
+    1ACE      O    6   1.428   1.345   1.398
+    2ALA      N    7   1.319   1.363   1.209
+    2ALA      H    8   1.322   1.382   1.110
+    2ALA     CA    9   1.191   1.329   1.265
+    2ALA     HA   10   1.186   1.364   1.368
+    2ALA     CB   11   1.075   1.391   1.178
+    2ALA    HB1   12   1.098   1.383   1.072
+    2ALA    HB2   13   0.980   1.348   1.211
+    2ALA    HB3   14   1.066   1.499   1.192
+    2ALA      C   15   1.169   1.174   1.275
+    2ALA      O   16   1.086   1.118   1.203
+    3NME      N   17   1.233   1.105   1.363
+    3NME      H   18   1.312   1.150   1.405
+    3NME    CH3   19   1.242   0.956   1.350
+    3NME   HH31   20   1.219   0.899   1.440
+    3NME   HH32   21   1.165   0.918   1.284
+    3NME   HH33   22   1.333   0.921   1.301
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  20.00000
+   22
+    1ACE   HH31    1   1.622   1.459   1.287
+    1ACE    CH3    2   1.546   1.434   1.214
+    1ACE   HH32    3   1.578   1.365   1.135
+    1ACE   HH33    4   1.509   1.531   1.180
+    1ACE      C    5   1.430   1.358   1.283
+    1ACE      O    6   1.444   1.310   1.394
+    2ALA      N    7   1.315   1.370   1.215
+    2ALA      H    8   1.323   1.427   1.132
+    2ALA     CA    9   1.178   1.334   1.258
+    2ALA     HA   10   1.163   1.376   1.357
+    2ALA     CB   11   1.079   1.393   1.158
+    2ALA    HB1   12   1.096   1.348   1.060
+    2ALA    HB2   13   0.979   1.367   1.192
+    2ALA    HB3   14   1.087   1.501   1.165
+    2ALA      C   15   1.163   1.177   1.270
+    2ALA      O   16   1.073   1.114   1.216
+    3NME      N   17   1.249   1.110   1.347
+    3NME      H   18   1.324   1.165   1.388
+    3NME    CH3   19   1.242   0.964   1.360
+    3NME   HH31   20   1.325   0.920   1.416
+    3NME   HH32   21   1.151   0.938   1.414
+    3NME   HH33   22   1.221   0.913   1.266
+  10.00000  10.00000  10.00000
diff --git a/regtest/basic/rt67/COLVAR.reference b/regtest/basic/rt67/COLVAR.reference
new file mode 100644
index 0000000000000000000000000000000000000000..7d00a355feca39f9bec7a530282a1b70349104d2
--- /dev/null
+++ b/regtest/basic/rt67/COLVAR.reference
@@ -0,0 +1,26 @@
+#! FIELDS time phi psi metad.bias metad.rbias metad.rct
+#! SET min_phi -pi
+#! SET max_phi pi
+#! SET min_psi -pi
+#! SET max_psi pi
+ 0.000000  -1.2379   0.8942   0.0000   0.0000   0.0000
+ 1.000000  -1.4839   1.0482   0.0000   0.0000   0.0089
+ 2.000000  -1.3243   0.6055   0.0753   0.0664   0.0184
+ 3.000000  -1.3340   0.6808   1.2805   1.2622   0.0308
+ 4.000000  -1.4613   1.3921   0.2720   0.2412   0.0410
+ 5.000000  -1.2202   0.7871   1.7491   1.7081   0.0562
+ 6.000000  -1.3883   1.0005   2.1113   2.0551   0.0743
+ 7.000000  -1.5481   1.3453   1.6160   1.5418   0.0893
+ 8.000000  -1.8429   1.3293   0.6692   0.5800   0.1025
+ 9.000000  -2.2424   2.6059   0.0000  -0.1025   0.1109
+ 10.000000  -1.1482   0.5350   1.8435   1.7326   0.1281
+ 11.000000  -1.7580   2.0752   0.0012  -0.1269   0.1367
+ 12.000000  -1.3186   3.0997   0.0000  -0.1367   0.1443
+ 13.000000  -2.9911   2.8991   0.0000  -0.1443   0.1524
+ 14.000000  -1.4112   0.0028   0.0285  -0.1239   0.1614
+ 15.000000  -2.5995   2.6683   0.3230   0.1616   0.1714
+ 16.000000  -1.4608   0.2622   0.9676   0.7962   0.1856
+ 17.000000  -1.3791   1.1576   3.0484   2.8628   0.2090
+ 18.000000  -1.6771   0.9078   1.5947   1.3857   0.2309
+ 19.000000  -1.5241   1.2623   4.1823   3.9513   0.2607
+ 20.000000  -1.1997   0.9529   3.1902   2.9295   0.2924
diff --git a/regtest/basic/rt67/Makefile b/regtest/basic/rt67/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..3703b27cea227aa053fb6d1d73f861e4384dbcee
--- /dev/null
+++ b/regtest/basic/rt67/Makefile
@@ -0,0 +1 @@
+include ../../scripts/test.make
diff --git a/regtest/basic/rt67/config b/regtest/basic/rt67/config
new file mode 100644
index 0000000000000000000000000000000000000000..ce858d0c5a1fc8ff0fa3f73d5836edaf432c82e8
--- /dev/null
+++ b/regtest/basic/rt67/config
@@ -0,0 +1,3 @@
+type=driver
+# this is to test a different name
+arg="--plumed plumed.dat --trajectory-stride 500 --timestep 0.002 --igro traj.gro"
diff --git a/regtest/basic/rt67/plumed.dat b/regtest/basic/rt67/plumed.dat
new file mode 100644
index 0000000000000000000000000000000000000000..6eed71d034826ddb7913b5f77f947c68276f6605
--- /dev/null
+++ b/regtest/basic/rt67/plumed.dat
@@ -0,0 +1,30 @@
+phi:   TORSION ATOMS=5,7,9,15     NOPBC
+psi:   TORSION ATOMS=7,9,15,17    NOPBC
+
+METAD ...
+ ARG=phi,psi
+ SIGMA=0.20,0.20
+ HEIGHT=1.20
+ BIASFACTOR=10
+ TEMP=300.0
+ PACE=500
+ LABEL=metad
+ FILE=HILLS
+ GRID_MIN=-pi,-pi
+ GRID_MAX=pi,pi
+ GRID_BIN=150,150
+ REWEIGHTING_NGRID=150,150
+ REWEIGHTING_NHILLS=1
+... METAD
+
+PRINT ...
+ ARG=phi,psi,metad.bias,metad.rbias,metad.rct
+ STRIDE=500
+ FILE=COLVAR
+ FMT=%8.4f
+... PRINT
+
+
+
+
+
diff --git a/regtest/basic/rt67/traj.gro b/regtest/basic/rt67/traj.gro
new file mode 100644
index 0000000000000000000000000000000000000000..c1c387a0144ec8021b9e5b0453be534f2ca906e2
--- /dev/null
+++ b/regtest/basic/rt67/traj.gro
@@ -0,0 +1,525 @@
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   0.00000
+   22
+    1ACE   HH31    1   1.474   1.585   1.200
+    1ACE    CH3    2   1.483   1.508   1.277
+    1ACE   HH32    3   1.476   1.561   1.372
+    1ACE   HH33    4   1.578   1.455   1.278
+    1ACE      C    5   1.353   1.428   1.279
+    1ACE      O    6   1.263   1.449   1.357
+    2ALA      N    7   1.343   1.328   1.191
+    2ALA      H    8   1.415   1.321   1.120
+    2ALA     CA    9   1.233   1.239   1.159
+    2ALA     HA   10   1.144   1.302   1.155
+    2ALA     CB   11   1.244   1.182   1.013
+    2ALA    HB1   12   1.341   1.136   0.992
+    2ALA    HB2   13   1.159   1.117   0.994
+    2ALA    HB3   14   1.242   1.265   0.942
+    2ALA      C   15   1.207   1.140   1.271
+    2ALA      O   16   1.214   1.017   1.241
+    3NME      N   17   1.191   1.177   1.398
+    3NME      H   18   1.192   1.275   1.421
+    3NME    CH3   19   1.189   1.086   1.518
+    3NME   HH31   20   1.170   0.983   1.487
+    3NME   HH32   21   1.283   1.087   1.574
+    3NME   HH33   22   1.108   1.127   1.578
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   1.00000
+   22
+    1ACE   HH31    1   1.480   1.571   1.214
+    1ACE    CH3    2   1.481   1.493   1.289
+    1ACE   HH32    3   1.502   1.528   1.390
+    1ACE   HH33    4   1.551   1.417   1.255
+    1ACE      C    5   1.344   1.432   1.275
+    1ACE      O    6   1.250   1.462   1.345
+    2ALA      N    7   1.342   1.327   1.193
+    2ALA      H    8   1.430   1.313   1.144
+    2ALA     CA    9   1.233   1.244   1.166
+    2ALA     HA   10   1.144   1.307   1.173
+    2ALA     CB   11   1.240   1.189   1.017
+    2ALA    HB1   12   1.327   1.124   1.000
+    2ALA    HB2   13   1.150   1.128   1.005
+    2ALA    HB3   14   1.251   1.267   0.941
+    2ALA      C   15   1.221   1.133   1.271
+    2ALA      O   16   1.217   1.015   1.238
+    3NME      N   17   1.204   1.174   1.395
+    3NME      H   18   1.200   1.275   1.398
+    3NME    CH3   19   1.188   1.089   1.516
+    3NME   HH31   20   1.083   1.086   1.543
+    3NME   HH32   21   1.233   0.990   1.511
+    3NME   HH33   22   1.241   1.141   1.596
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   2.00000
+   22
+    1ACE   HH31    1   1.532   1.520   1.209
+    1ACE    CH3    2   1.478   1.493   1.300
+    1ACE   HH32    3   1.465   1.586   1.356
+    1ACE   HH33    4   1.548   1.426   1.350
+    1ACE      C    5   1.352   1.423   1.279
+    1ACE      O    6   1.252   1.461   1.340
+    2ALA      N    7   1.351   1.326   1.190
+    2ALA      H    8   1.442   1.293   1.160
+    2ALA     CA    9   1.232   1.244   1.160
+    2ALA     HA   10   1.146   1.310   1.151
+    2ALA     CB   11   1.241   1.190   1.016
+    2ALA    HB1   12   1.333   1.132   1.008
+    2ALA    HB2   13   1.160   1.123   0.986
+    2ALA    HB3   14   1.242   1.280   0.955
+    2ALA      C   15   1.203   1.138   1.270
+    2ALA      O   16   1.161   1.021   1.240
+    3NME      N   17   1.230   1.171   1.396
+    3NME      H   18   1.257   1.266   1.417
+    3NME    CH3   19   1.217   1.090   1.512
+    3NME   HH31   20   1.144   1.011   1.493
+    3NME   HH32   21   1.307   1.029   1.526
+    3NME   HH33   22   1.212   1.146   1.605
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   3.00000
+   22
+    1ACE   HH31    1   1.439   1.582   1.175
+    1ACE    CH3    2   1.474   1.516   1.254
+    1ACE   HH32    3   1.480   1.585   1.338
+    1ACE   HH33    4   1.569   1.465   1.242
+    1ACE      C    5   1.364   1.419   1.280
+    1ACE      O    6   1.277   1.446   1.367
+    2ALA      N    7   1.358   1.323   1.194
+    2ALA      H    8   1.443   1.313   1.140
+    2ALA     CA    9   1.235   1.243   1.164
+    2ALA     HA   10   1.150   1.310   1.170
+    2ALA     CB   11   1.240   1.197   1.019
+    2ALA    HB1   12   1.316   1.119   1.016
+    2ALA    HB2   13   1.145   1.157   0.982
+    2ALA    HB3   14   1.279   1.276   0.955
+    2ALA      C   15   1.201   1.137   1.272
+    2ALA      O   16   1.172   1.021   1.232
+    3NME      N   17   1.218   1.166   1.402
+    3NME      H   18   1.240   1.259   1.434
+    3NME    CH3   19   1.186   1.086   1.518
+    3NME   HH31   20   1.225   0.984   1.527
+    3NME   HH32   21   1.193   1.134   1.616
+    3NME   HH33   22   1.081   1.058   1.509
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   4.00000
+   22
+    1ACE   HH31    1   1.549   1.508   1.196
+    1ACE    CH3    2   1.500   1.486   1.290
+    1ACE   HH32    3   1.487   1.571   1.357
+    1ACE   HH33    4   1.563   1.415   1.343
+    1ACE      C    5   1.362   1.425   1.270
+    1ACE      O    6   1.265   1.465   1.340
+    2ALA      N    7   1.349   1.324   1.182
+    2ALA      H    8   1.432   1.287   1.138
+    2ALA     CA    9   1.221   1.249   1.168
+    2ALA     HA   10   1.138   1.318   1.184
+    2ALA     CB   11   1.201   1.194   1.025
+    2ALA    HB1   12   1.276   1.117   1.005
+    2ALA    HB2   13   1.096   1.165   1.014
+    2ALA    HB3   14   1.229   1.265   0.947
+    2ALA      C   15   1.217   1.141   1.275
+    2ALA      O   16   1.234   1.024   1.243
+    3NME      N   17   1.183   1.174   1.400
+    3NME      H   18   1.184   1.274   1.412
+    3NME    CH3   19   1.187   1.078   1.509
+    3NME   HH31   20   1.248   0.990   1.490
+    3NME   HH32   21   1.220   1.120   1.604
+    3NME   HH33   22   1.088   1.035   1.527
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   5.00000
+   22
+    1ACE   HH31    1   1.449   1.585   1.168
+    1ACE    CH3    2   1.479   1.518   1.248
+    1ACE   HH32    3   1.523   1.577   1.328
+    1ACE   HH33    4   1.565   1.461   1.213
+    1ACE      C    5   1.364   1.422   1.284
+    1ACE      O    6   1.305   1.438   1.389
+    2ALA      N    7   1.347   1.326   1.187
+    2ALA      H    8   1.423   1.328   1.122
+    2ALA     CA    9   1.226   1.241   1.162
+    2ALA     HA   10   1.139   1.308   1.162
+    2ALA     CB   11   1.236   1.193   1.023
+    2ALA    HB1   12   1.314   1.117   1.012
+    2ALA    HB2   13   1.137   1.167   0.986
+    2ALA    HB3   14   1.273   1.278   0.966
+    2ALA      C   15   1.195   1.133   1.268
+    2ALA      O   16   1.173   1.016   1.239
+    3NME      N   17   1.204   1.175   1.393
+    3NME      H   18   1.211   1.275   1.403
+    3NME    CH3   19   1.188   1.090   1.513
+    3NME   HH31   20   1.089   1.044   1.509
+    3NME   HH32   21   1.267   1.014   1.509
+    3NME   HH33   22   1.189   1.145   1.607
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   6.00000
+   22
+    1ACE   HH31    1   1.517   1.511   1.181
+    1ACE    CH3    2   1.490   1.488   1.284
+    1ACE   HH32    3   1.482   1.582   1.339
+    1ACE   HH33    4   1.569   1.421   1.316
+    1ACE      C    5   1.359   1.414   1.282
+    1ACE      O    6   1.272   1.447   1.358
+    2ALA      N    7   1.351   1.320   1.186
+    2ALA      H    8   1.434   1.297   1.133
+    2ALA     CA    9   1.220   1.251   1.159
+    2ALA     HA   10   1.139   1.323   1.167
+    2ALA     CB   11   1.220   1.194   1.018
+    2ALA    HB1   12   1.298   1.120   1.003
+    2ALA    HB2   13   1.120   1.158   0.994
+    2ALA    HB3   14   1.224   1.286   0.960
+    2ALA      C   15   1.201   1.139   1.270
+    2ALA      O   16   1.190   1.022   1.239
+    3NME      N   17   1.203   1.178   1.393
+    3NME      H   18   1.207   1.277   1.409
+    3NME    CH3   19   1.211   1.102   1.515
+    3NME   HH31   20   1.111   1.064   1.534
+    3NME   HH32   21   1.275   1.017   1.492
+    3NME   HH33   22   1.264   1.151   1.597
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   7.00000
+   22
+    1ACE   HH31    1   1.483   1.590   1.185
+    1ACE    CH3    2   1.505   1.501   1.245
+    1ACE   HH32    3   1.538   1.533   1.344
+    1ACE   HH33    4   1.580   1.430   1.209
+    1ACE      C    5   1.379   1.418   1.267
+    1ACE      O    6   1.298   1.443   1.349
+    2ALA      N    7   1.360   1.320   1.187
+    2ALA      H    8   1.426   1.297   1.114
+    2ALA     CA    9   1.224   1.253   1.180
+    2ALA     HA   10   1.147   1.326   1.205
+    2ALA     CB   11   1.174   1.215   1.037
+    2ALA    HB1   12   1.245   1.152   0.983
+    2ALA    HB2   13   1.084   1.154   1.032
+    2ALA    HB3   14   1.153   1.311   0.992
+    2ALA      C   15   1.212   1.141   1.280
+    2ALA      O   16   1.219   1.022   1.244
+    3NME      N   17   1.191   1.176   1.408
+    3NME      H   18   1.207   1.275   1.423
+    3NME    CH3   19   1.162   1.068   1.509
+    3NME   HH31   20   1.229   0.982   1.503
+    3NME   HH32   21   1.162   1.109   1.610
+    3NME   HH33   22   1.056   1.044   1.499
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   8.00000
+   22
+    1ACE   HH31    1   1.576   1.425   1.169
+    1ACE    CH3    2   1.523   1.455   1.260
+    1ACE   HH32    3   1.547   1.556   1.294
+    1ACE   HH33    4   1.566   1.393   1.338
+    1ACE      C    5   1.385   1.422   1.255
+    1ACE      O    6   1.308   1.499   1.305
+    2ALA      N    7   1.346   1.311   1.189
+    2ALA      H    8   1.419   1.248   1.159
+    2ALA     CA    9   1.210   1.260   1.193
+    2ALA     HA   10   1.139   1.326   1.242
+    2ALA     CB   11   1.152   1.252   1.051
+    2ALA    HB1   12   1.230   1.210   0.987
+    2ALA    HB2   13   1.066   1.185   1.052
+    2ALA    HB3   14   1.127   1.354   1.024
+    2ALA      C   15   1.206   1.136   1.282
+    2ALA      O   16   1.195   1.023   1.229
+    3NME      N   17   1.210   1.152   1.420
+    3NME      H   18   1.221   1.243   1.463
+    3NME    CH3   19   1.185   1.048   1.518
+    3NME   HH31   20   1.195   0.948   1.475
+    3NME   HH32   21   1.261   1.070   1.593
+    3NME   HH33   22   1.088   1.064   1.565
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=   9.00000
+   22
+    1ACE   HH31    1   1.515   1.474   1.040
+    1ACE    CH3    2   1.535   1.461   1.147
+    1ACE   HH32    3   1.561   1.560   1.184
+    1ACE   HH33    4   1.612   1.386   1.165
+    1ACE      C    5   1.406   1.430   1.217
+    1ACE      O    6   1.361   1.502   1.307
+    2ALA      N    7   1.345   1.316   1.190
+    2ALA      H    8   1.384   1.254   1.121
+    2ALA     CA    9   1.217   1.277   1.242
+    2ALA     HA   10   1.187   1.348   1.319
+    2ALA     CB   11   1.111   1.278   1.134
+    2ALA    HB1   12   1.129   1.198   1.062
+    2ALA    HB2   13   1.018   1.269   1.189
+    2ALA    HB3   14   1.121   1.372   1.079
+    2ALA      C   15   1.217   1.133   1.309
+    2ALA      O   16   1.293   1.044   1.265
+    3NME      N   17   1.132   1.116   1.408
+    3NME      H   18   1.076   1.195   1.437
+    3NME    CH3   19   1.112   1.003   1.490
+    3NME   HH31   20   1.156   0.910   1.456
+    3NME   HH32   21   1.153   1.026   1.588
+    3NME   HH33   22   1.005   0.985   1.500
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  10.00000
+   22
+    1ACE   HH31    1   1.536   1.485   1.135
+    1ACE    CH3    2   1.521   1.460   1.240
+    1ACE   HH32    3   1.528   1.557   1.289
+    1ACE   HH33    4   1.602   1.397   1.276
+    1ACE      C    5   1.385   1.401   1.261
+    1ACE      O    6   1.341   1.416   1.373
+    2ALA      N    7   1.322   1.332   1.167
+    2ALA      H    8   1.364   1.316   1.076
+    2ALA     CA    9   1.190   1.273   1.177
+    2ALA     HA   10   1.125   1.352   1.216
+    2ALA     CB   11   1.134   1.230   1.038
+    2ALA    HB1   12   1.167   1.128   1.016
+    2ALA    HB2   13   1.026   1.238   1.046
+    2ALA    HB3   14   1.174   1.287   0.953
+    2ALA      C   15   1.183   1.157   1.283
+    2ALA      O   16   1.111   1.061   1.259
+    3NME      N   17   1.264   1.157   1.396
+    3NME      H   18   1.320   1.241   1.405
+    3NME    CH3   19   1.264   1.070   1.510
+    3NME   HH31   20   1.163   1.057   1.548
+    3NME   HH32   21   1.311   0.974   1.487
+    3NME   HH33   22   1.326   1.109   1.592
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  11.00000
+   22
+    1ACE   HH31    1   1.607   1.359   1.178
+    1ACE    CH3    2   1.535   1.442   1.176
+    1ACE   HH32    3   1.521   1.470   1.072
+    1ACE   HH33    4   1.569   1.533   1.224
+    1ACE      C    5   1.402   1.412   1.242
+    1ACE      O    6   1.368   1.454   1.350
+    2ALA      N    7   1.319   1.332   1.177
+    2ALA      H    8   1.363   1.279   1.103
+    2ALA     CA    9   1.194   1.289   1.231
+    2ALA     HA   10   1.153   1.355   1.308
+    2ALA     CB   11   1.092   1.300   1.113
+    2ALA    HB1   12   1.137   1.243   1.032
+    2ALA    HB2   13   1.001   1.243   1.131
+    2ALA    HB3   14   1.070   1.405   1.095
+    2ALA      C   15   1.198   1.143   1.290
+    2ALA      O   16   1.237   1.057   1.213
+    3NME      N   17   1.171   1.126   1.422
+    3NME      H   18   1.164   1.213   1.472
+    3NME    CH3   19   1.200   1.009   1.496
+    3NME   HH31   20   1.118   0.938   1.493
+    3NME   HH32   21   1.284   0.953   1.454
+    3NME   HH33   22   1.230   1.031   1.598
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  12.00000
+   22
+    1ACE   HH31    1   1.491   1.569   1.138
+    1ACE    CH3    2   1.511   1.462   1.134
+    1ACE   HH32    3   1.614   1.449   1.166
+    1ACE   HH33    4   1.495   1.444   1.028
+    1ACE      C    5   1.416   1.394   1.229
+    1ACE      O    6   1.445   1.392   1.345
+    2ALA      N    7   1.299   1.357   1.181
+    2ALA      H    8   1.278   1.358   1.082
+    2ALA     CA    9   1.196   1.301   1.267
+    2ALA     HA   10   1.185   1.364   1.355
+    2ALA     CB   11   1.063   1.319   1.182
+    2ALA    HB1   12   1.057   1.248   1.100
+    2ALA    HB2   13   0.976   1.288   1.240
+    2ALA    HB3   14   1.037   1.423   1.161
+    2ALA      C   15   1.226   1.161   1.304
+    2ALA      O   16   1.317   1.094   1.258
+    3NME      N   17   1.135   1.110   1.387
+    3NME      H   18   1.064   1.174   1.419
+    3NME    CH3   19   1.121   0.972   1.429
+    3NME   HH31   20   1.163   0.900   1.358
+    3NME   HH32   21   1.177   0.954   1.520
+    3NME   HH33   22   1.016   0.942   1.428
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  13.00000
+   22
+    1ACE   HH31    1   1.528   1.537   1.077
+    1ACE    CH3    2   1.543   1.448   1.137
+    1ACE   HH32    3   1.634   1.463   1.195
+    1ACE   HH33    4   1.560   1.362   1.072
+    1ACE      C    5   1.421   1.428   1.229
+    1ACE      O    6   1.396   1.520   1.301
+    2ALA      N    7   1.355   1.314   1.219
+    2ALA      H    8   1.385   1.241   1.156
+    2ALA     CA    9   1.249   1.276   1.311
+    2ALA     HA   10   1.297   1.288   1.409
+    2ALA     CB   11   1.122   1.359   1.284
+    2ALA    HB1   12   1.072   1.325   1.193
+    2ALA    HB2   13   1.053   1.352   1.367
+    2ALA    HB3   14   1.153   1.463   1.275
+    2ALA      C   15   1.204   1.131   1.290
+    2ALA      O   16   1.225   1.070   1.185
+    3NME      N   17   1.131   1.077   1.382
+    3NME      H   18   1.104   1.132   1.463
+    3NME    CH3   19   1.083   0.939   1.380
+    3NME   HH31   20   1.012   0.925   1.298
+    3NME   HH32   21   1.168   0.871   1.372
+    3NME   HH33   22   1.036   0.915   1.475
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  14.00000
+   22
+    1ACE   HH31    1   1.543   1.468   1.123
+    1ACE    CH3    2   1.548   1.443   1.229
+    1ACE   HH32    3   1.566   1.540   1.276
+    1ACE   HH33    4   1.634   1.382   1.257
+    1ACE      C    5   1.420   1.385   1.285
+    1ACE      O    6   1.412   1.375   1.404
+    2ALA      N    7   1.324   1.361   1.200
+    2ALA      H    8   1.345   1.354   1.101
+    2ALA     CA    9   1.189   1.323   1.244
+    2ALA     HA   10   1.163   1.394   1.323
+    2ALA     CB   11   1.094   1.344   1.125
+    2ALA    HB1   12   1.098   1.270   1.045
+    2ALA    HB2   13   0.995   1.352   1.170
+    2ALA    HB3   14   1.120   1.440   1.079
+    2ALA      C   15   1.166   1.169   1.284
+    2ALA      O   16   1.055   1.145   1.330
+    3NME      N   17   1.263   1.077   1.279
+    3NME      H   18   1.356   1.102   1.247
+    3NME    CH3   19   1.246   0.942   1.335
+    3NME   HH31   20   1.142   0.911   1.345
+    3NME   HH32   21   1.293   0.868   1.270
+    3NME   HH33   22   1.292   0.934   1.434
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  15.00000
+   22
+    1ACE   HH31    1   1.508   1.417   1.043
+    1ACE    CH3    2   1.539   1.448   1.143
+    1ACE   HH32    3   1.565   1.553   1.146
+    1ACE   HH33    4   1.630   1.395   1.169
+    1ACE      C    5   1.438   1.410   1.253
+    1ACE      O    6   1.429   1.471   1.356
+    2ALA      N    7   1.348   1.327   1.217
+    2ALA      H    8   1.362   1.285   1.126
+    2ALA     CA    9   1.233   1.289   1.298
+    2ALA     HA   10   1.269   1.295   1.401
+    2ALA     CB   11   1.107   1.379   1.286
+    2ALA    HB1   12   1.057   1.360   1.191
+    2ALA    HB2   13   1.034   1.369   1.366
+    2ALA    HB3   14   1.141   1.482   1.282
+    2ALA      C   15   1.192   1.141   1.266
+    2ALA      O   16   1.220   1.089   1.156
+    3NME      N   17   1.131   1.075   1.364
+    3NME      H   18   1.117   1.126   1.450
+    3NME    CH3   19   1.090   0.931   1.376
+    3NME   HH31   20   1.156   0.880   1.446
+    3NME   HH32   21   0.996   0.929   1.431
+    3NME   HH33   22   1.090   0.874   1.283
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  16.00000
+   22
+    1ACE   HH31    1   1.587   1.386   1.166
+    1ACE    CH3    2   1.554   1.425   1.262
+    1ACE   HH32    3   1.559   1.534   1.266
+    1ACE   HH33    4   1.627   1.390   1.335
+    1ACE      C    5   1.417   1.372   1.300
+    1ACE      O    6   1.390   1.364   1.421
+    2ALA      N    7   1.334   1.344   1.205
+    2ALA      H    8   1.365   1.367   1.111
+    2ALA     CA    9   1.190   1.324   1.235
+    2ALA     HA   10   1.160   1.386   1.319
+    2ALA     CB   11   1.105   1.363   1.112
+    2ALA    HB1   12   1.129   1.297   1.029
+    2ALA    HB2   13   0.999   1.351   1.131
+    2ALA    HB3   14   1.125   1.467   1.088
+    2ALA      C   15   1.162   1.180   1.282
+    2ALA      O   16   1.054   1.128   1.258
+    3NME      N   17   1.261   1.106   1.318
+    3NME      H   18   1.349   1.152   1.336
+    3NME    CH3   19   1.250   0.960   1.324
+    3NME   HH31   20   1.264   0.908   1.229
+    3NME   HH32   21   1.322   0.926   1.399
+    3NME   HH33   22   1.153   0.923   1.357
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  17.00000
+   22
+    1ACE   HH31    1   1.614   1.382   1.173
+    1ACE    CH3    2   1.559   1.432   1.253
+    1ACE   HH32    3   1.547   1.532   1.213
+    1ACE   HH33    4   1.625   1.444   1.339
+    1ACE      C    5   1.426   1.380   1.288
+    1ACE      O    6   1.411   1.348   1.406
+    2ALA      N    7   1.325   1.370   1.200
+    2ALA      H    8   1.341   1.388   1.102
+    2ALA     CA    9   1.189   1.318   1.239
+    2ALA     HA   10   1.170   1.358   1.338
+    2ALA     CB   11   1.084   1.388   1.158
+    2ALA    HB1   12   1.113   1.369   1.055
+    2ALA    HB2   13   0.994   1.336   1.189
+    2ALA    HB3   14   1.075   1.493   1.186
+    2ALA      C   15   1.170   1.163   1.252
+    2ALA      O   16   1.097   1.103   1.171
+    3NME      N   17   1.235   1.099   1.349
+    3NME      H   18   1.305   1.153   1.399
+    3NME    CH3   19   1.220   0.964   1.393
+    3NME   HH31   20   1.315   0.912   1.406
+    3NME   HH32   21   1.168   0.953   1.489
+    3NME   HH33   22   1.178   0.897   1.318
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  18.00000
+   22
+    1ACE   HH31    1   1.555   1.419   1.126
+    1ACE    CH3    2   1.554   1.431   1.235
+    1ACE   HH32    3   1.554   1.535   1.267
+    1ACE   HH33    4   1.638   1.381   1.283
+    1ACE      C    5   1.423   1.378   1.292
+    1ACE      O    6   1.416   1.347   1.409
+    2ALA      N    7   1.322   1.351   1.211
+    2ALA      H    8   1.350   1.370   1.115
+    2ALA     CA    9   1.185   1.318   1.251
+    2ALA     HA   10   1.171   1.358   1.352
+    2ALA     CB   11   1.091   1.400   1.149
+    2ALA    HB1   12   1.059   1.346   1.060
+    2ALA    HB2   13   1.008   1.443   1.205
+    2ALA    HB3   14   1.154   1.480   1.109
+    2ALA      C   15   1.163   1.166   1.255
+    2ALA      O   16   1.060   1.108   1.214
+    3NME      N   17   1.255   1.102   1.328
+    3NME      H   18   1.335   1.159   1.354
+    3NME    CH3   19   1.246   0.964   1.369
+    3NME   HH31   20   1.154   0.913   1.344
+    3NME   HH32   21   1.323   0.899   1.327
+    3NME   HH33   22   1.251   0.953   1.477
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  19.00000
+   22
+    1ACE   HH31    1   1.559   1.326   1.133
+    1ACE    CH3    2   1.552   1.413   1.200
+    1ACE   HH32    3   1.538   1.504   1.142
+    1ACE   HH33    4   1.631   1.428   1.273
+    1ACE      C    5   1.426   1.375   1.280
+    1ACE      O    6   1.428   1.345   1.398
+    2ALA      N    7   1.319   1.363   1.209
+    2ALA      H    8   1.322   1.382   1.110
+    2ALA     CA    9   1.191   1.329   1.265
+    2ALA     HA   10   1.186   1.364   1.368
+    2ALA     CB   11   1.075   1.391   1.178
+    2ALA    HB1   12   1.098   1.383   1.072
+    2ALA    HB2   13   0.980   1.348   1.211
+    2ALA    HB3   14   1.066   1.499   1.192
+    2ALA      C   15   1.169   1.174   1.275
+    2ALA      O   16   1.086   1.118   1.203
+    3NME      N   17   1.233   1.105   1.363
+    3NME      H   18   1.312   1.150   1.405
+    3NME    CH3   19   1.242   0.956   1.350
+    3NME   HH31   20   1.219   0.899   1.440
+    3NME   HH32   21   1.165   0.918   1.284
+    3NME   HH33   22   1.333   0.921   1.301
+  10.00000  10.00000  10.00000
+Generated by trjconv : Gromacs Runs One Microsecond At Cannonball Speeds t=  20.00000
+   22
+    1ACE   HH31    1   1.622   1.459   1.287
+    1ACE    CH3    2   1.546   1.434   1.214
+    1ACE   HH32    3   1.578   1.365   1.135
+    1ACE   HH33    4   1.509   1.531   1.180
+    1ACE      C    5   1.430   1.358   1.283
+    1ACE      O    6   1.444   1.310   1.394
+    2ALA      N    7   1.315   1.370   1.215
+    2ALA      H    8   1.323   1.427   1.132
+    2ALA     CA    9   1.178   1.334   1.258
+    2ALA     HA   10   1.163   1.376   1.357
+    2ALA     CB   11   1.079   1.393   1.158
+    2ALA    HB1   12   1.096   1.348   1.060
+    2ALA    HB2   13   0.979   1.367   1.192
+    2ALA    HB3   14   1.087   1.501   1.165
+    2ALA      C   15   1.163   1.177   1.270
+    2ALA      O   16   1.073   1.114   1.216
+    3NME      N   17   1.249   1.110   1.347
+    3NME      H   18   1.324   1.165   1.388
+    3NME    CH3   19   1.242   0.964   1.360
+    3NME   HH31   20   1.325   0.920   1.416
+    3NME   HH32   21   1.151   0.938   1.414
+    3NME   HH33   22   1.221   0.913   1.266
+  10.00000  10.00000  10.00000