Index: branches/MarsWobble/mfileio/MWriteFitsFile.cc
===================================================================
--- branches/MarsWobble/mfileio/MWriteFitsFile.cc	(revision 18160)
+++ branches/MarsWobble/mfileio/MWriteFitsFile.cc	(revision 18161)
@@ -519,7 +519,8 @@
 
          // initialize all columns of the sub-table, defined by the current container
+         TString containerName = i_subTable->second.GetContainer()->GetName();
          TClass * cl = i_subTable->second.GetContainer()->IsA();
-         if (!InitColumns(i_table->first, TString(cl->GetName()) + ".",  fitsTable, 
-                          i_subTable->second.GetContainer(), cl)     ) 
+         if (!InitColumns(i_table->first, containerName + ".",  fitsTable,
+                          i_subTable->second.GetContainer(), cl)     )
             return kFALSE;