Index: /trunk/Mars/mcore/zfits.h
===================================================================
--- /trunk/Mars/mcore/zfits.h	(revision 17766)
+++ /trunk/Mars/mcore/zfits.h	(revision 17767)
@@ -439,5 +439,5 @@
                     str << "Unkown column ordering scheme found (i=" << i << ", " << fColumnOrdering[i] << ")";
 #ifdef __EXCEPTIONS
-                    throw std::runtime_error(str);
+                    throw std::runtime_error(str.str());
 #else
                     gLog << ___err___ << "ERROR - " << str.str() << std::endl;