Index: trunk/MagicSoft/Mars/mbase/MRunIter.cc
===================================================================
--- trunk/MagicSoft/Mars/mbase/MRunIter.cc	(revision 2993)
+++ trunk/MagicSoft/Mars/mbase/MRunIter.cc	(revision 3002)
@@ -26,4 +26,8 @@
 //
 //  MRunIter
+//
+//  Use this to iterate over run-files giving only the run-number.
+//
+//  You need the specify the run-file root-directory (eg /data/MAGIC).
 //
 /////////////////////////////////////////////////////////////////////////////