Index: trunk/MagicSoft/Mars/datacenter/macros/fillstar.C
===================================================================
--- trunk/MagicSoft/Mars/datacenter/macros/fillstar.C	(revision 8191)
+++ trunk/MagicSoft/Mars/datacenter/macros/fillstar.C	(revision 8203)
@@ -185,4 +185,6 @@
     Float_t mrate  = num/effon;
     mrate = TMath::Nint(mrate*100)/100.;
+    if (mrate<0)
+        mrate=0;
     TString muonrate = Form("%6.2f", mrate);
     Int_t effontime = TMath::Nint(effon);