Index: trunk/Mars/mraw/MRawRunHeader.cc
===================================================================
--- trunk/Mars/mraw/MRawRunHeader.cc	(revision 12944)
+++ trunk/Mars/mraw/MRawRunHeader.cc	(revision 12945)
@@ -1021,9 +1021,9 @@
     }
     *fLog << endl;
-    if (fFormatVersion>10)
+    if (fFormatVersion>10 && fHeaderSizeRun>0 && fHeaderSizeEvt>0 && fHeaderSizeCrate>0)
         *fLog << "Header sizes: " << fHeaderSizeRun << "b (run), " << fHeaderSizeEvt << "b (evt), " << fHeaderSizeCrate << "b (crate)" << endl;
     if (fRunNumber>0)
     {
-        if (fFormatVersion>5)
+        if (fFormatVersion>5 && fTelescopeNumber>0)
             *fLog << "Telescope:    " << fTelescopeNumber << endl;
         *fLog << "RunNumber:    " << fRunNumber;