Index: wflow-py/wflow/wf_DynamicFramework.py
===================================================================
diff -u -rc55cb802eb203cf69033ba5a1ef0d1aff59102f0 -r5cea5f86bde05200c2a96adadc57e5d15f1fa081
--- wflow-py/wflow/wf_DynamicFramework.py	(.../wf_DynamicFramework.py)	(revision c55cb802eb203cf69033ba5a1ef0d1aff59102f0)
+++ wflow-py/wflow/wf_DynamicFramework.py	(.../wf_DynamicFramework.py)	(revision 5cea5f86bde05200c2a96adadc57e5d15f1fa081)
@@ -1890,7 +1890,7 @@
         if laststep == 0:
             laststep = self._d_lastTimestep
 
-        self._userModel()._setNrTimeSteps(laststep)
+        self._userModel()._setNrTimeSteps(int(laststep))
 
         while step <= self._userModel().nrTimeSteps():