diff --git a/trunk/src/mse/state.py b/trunk/src/mse/state.py
index b8b2505048ddf7fb3df7d855400571ca6f925556..9b318a56ad3780199e9e668f8b67f1f0b3b2ba09 100644
--- a/trunk/src/mse/state.py
+++ b/trunk/src/mse/state.py
@@ -37,7 +37,7 @@ class state:
         :param real nStep: the number of step or time
         """
         indexComp=0
-        for f in self.exportFiles:
+        for indexComp, f in enumerate(self.exportFiles):
             f.write_function(self.comps[indexComp],nStep)
     def vectorToState(self,aVec,curIndexInVec):
         from mse.linAlgTools import vector