Index: trunk/Mars/mfileio/MReadTree.h
===================================================================
--- trunk/Mars/mfileio/MReadTree.h	(revision 19260)
+++ trunk/Mars/mfileio/MReadTree.h	(revision 19261)
@@ -21,6 +21,6 @@
     TTree  *fTree;             // Pointer to tree
 
-    UInt_t  fNumEntry;         // Number of actual entry in chain
-    UInt_t  fNumEntries;       // Number of Events in chain
+    Long64_t fNumEntry;        // Number of actual entry in chain
+    Long64_t fNumEntries;      // Number of Events in chain
 
     Bool_t  fBranchChoosing;   // Flag for branch choosing method