diff --git a/regtest/rt-gt-27/Makefile b/regtest/rt28/Makefile
similarity index 100%
rename from regtest/rt-gt-27/Makefile
rename to regtest/rt28/Makefile
diff --git a/regtest/rt-gt-27/config b/regtest/rt28/config
similarity index 100%
rename from regtest/rt-gt-27/config
rename to regtest/rt28/config
diff --git a/regtest/rt-gt-28/derivatives.reference b/regtest/rt28/derivatives.reference
similarity index 100%
rename from regtest/rt-gt-28/derivatives.reference
rename to regtest/rt28/derivatives.reference
diff --git a/regtest/rt-gt-28/field.1.reference b/regtest/rt28/field.1.reference
similarity index 100%
rename from regtest/rt-gt-28/field.1.reference
rename to regtest/rt28/field.1.reference
diff --git a/regtest/rt-gt-28/plumed.dat b/regtest/rt28/plumed.dat
similarity index 100%
rename from regtest/rt-gt-28/plumed.dat
rename to regtest/rt28/plumed.dat
diff --git a/regtest/rt-gt-27/trajectory.xyz b/regtest/rt28/trajectory.xyz
similarity index 100%
rename from regtest/rt-gt-27/trajectory.xyz
rename to regtest/rt28/trajectory.xyz
diff --git a/regtest/rt-gt-28/Makefile b/regtest/rt29/Makefile
similarity index 100%
rename from regtest/rt-gt-28/Makefile
rename to regtest/rt29/Makefile
diff --git a/regtest/rt-gt-28/config b/regtest/rt29/config
similarity index 100%
rename from regtest/rt-gt-28/config
rename to regtest/rt29/config
diff --git a/regtest/rt-gt-27/derivatives.reference b/regtest/rt29/derivatives.reference
similarity index 100%
rename from regtest/rt-gt-27/derivatives.reference
rename to regtest/rt29/derivatives.reference
diff --git a/regtest/rt-gt-27/plumed.dat b/regtest/rt29/plumed.dat
similarity index 100%
rename from regtest/rt-gt-27/plumed.dat
rename to regtest/rt29/plumed.dat
diff --git a/regtest/rt-gt-28/trajectory.xyz b/regtest/rt29/trajectory.xyz
similarity index 100%
rename from regtest/rt-gt-28/trajectory.xyz
rename to regtest/rt29/trajectory.xyz
diff --git a/src/ContactMap.cpp b/src/ContactMap.cpp
index cb53f1077cc62cd93133eb70444e9fd9e8cc6caa..e7724d89b95616dac2a05be6fcac823f735fe796 100644
--- a/src/ContactMap.cpp
+++ b/src/ContactMap.cpp
@@ -53,7 +53,7 @@ reduceListAtNextStep(false)
   parseFlag("SUM",dosum);
   bool nopbc=!pbc;
   parseFlag("NOPBC",nopbc);
-  pbc=!nopbc;  parseFlag("PBC",pbc);
+  pbc=!nopbc;  
 
   // Read in the atoms
   std::vector<AtomNumber> t, ga_lista, gb_lista;