Index: trunk/MagicSoft/Mars/mdata/MDataChain.h
===================================================================
--- trunk/MagicSoft/Mars/mdata/MDataChain.h	(revision 6572)
+++ trunk/MagicSoft/Mars/mdata/MDataChain.h	(revision 6577)
@@ -46,5 +46,5 @@
     void   SimplifyString(TString &txt) const;
     void   AddParenthesis(TString &test, const TString op="^%*/+-") const;
-    MData *ParseString(TString txt, Int_t level);
+    MData *ParseString(TString txt, Int_t level=0);
     MData *ParseDataMember(TString txt);