Index: /trunk/Mars/mjobs/MJSimulation.cc
===================================================================
--- /trunk/Mars/mjobs/MJSimulation.cc	(revision 15061)
+++ /trunk/Mars/mjobs/MJSimulation.cc	(revision 15062)
@@ -540,5 +540,6 @@
     const TString rule2(Form(fmt, 'Y'));
     const TString rule4(Form(fmt, 'I'));
-    const TString rule3(Form(fmt, header.GetRunTypeChar()));
+    TString rule3(Form(fmt, header.GetRunTypeChar()));
+    rule3.ReplaceAll("$1.root/", "$1.fits/");
 
     MWriteRootFile write4a( 2, rule4, fOverwrite?"RECREATE":"NEW", "Star file");