Index: trunk/Mars/mjobs/MJSimulation.cc
===================================================================
--- trunk/Mars/mjobs/MJSimulation.cc	(revision 15062)
+++ trunk/Mars/mjobs/MJSimulation.cc	(revision 15063)
@@ -541,5 +541,6 @@
     const TString rule4(Form(fmt, 'I'));
     TString rule3(Form(fmt, header.GetRunTypeChar()));
-    rule3.ReplaceAll("$1.root/", "$1.fits/");
+    if (fWriteFitsFile)
+        rule3.ReplaceAll("$1.root/", "$1.fits/");
 
     MWriteRootFile write4a( 2, rule4, fOverwrite?"RECREATE":"NEW", "Star file");