diff --git a/LDDsimulation/LDDsimulation.py b/LDDsimulation/LDDsimulation.py
index ed6700746dfac10392a51a2e9a65aea354ed545b..52ccc2b1c9064c6dfac6e104a69acaea168c11d5 100644
--- a/LDDsimulation/LDDsimulation.py
+++ b/LDDsimulation/LDDsimulation.py
@@ -1563,7 +1563,9 @@ class LDDsimulation(object):
         # if we want to investigate the EOC and mesh dependence, we do not want
         # to put all data files with different grids in different directories.
         if self.mesh_study:
-            dirname = "dt" + "{}".format(self.timestep_size)+ "mesh_study_on-[{1:.2f},{1:.2f}]".format(self.starttime,self.endtime) + gravity_string + "/"
+            #"{number:.{digits}f}".format(number=h, digits=3)
+            dirname = "dt" + "{}".format(self.timestep_size)+ \
+            "mesh_study_on-[{start:.{digits}f},{end:.{digits}f}]".format(start=self.starttime,end=self.endtime,digits=2) + gravity_string + "/"
         else:
             dirname = "mesh_res" + "{}_".format(self.mesh_resolution)\
                   + "dt" + "{}".format(self.timestep_size)\