Sometimes during a system copy/refresh you might face some problems with system variant corrupted.
Usually when you try to load them you get a dump. So here you will find options to correct these system variants.
1st Option: Use report RS_VARDOC or RS_VARDOC_610;
2nd Option: Try to copy the system variants from productive system;
3rd Option: Delete the variant and create again.
Some background:
•Main variant table/field:
Table VARI - ABAP/4: Variant storage
Field CLUSTD (LRAW)- Contents of variant
•Functions usefull:
RS_VARIANT_CONTENTS
RS_CHANGE_CREATED_VARIANT
Sample report to mass change variants:
http://wiki.scn.sap.com/wiki/display/Snippets/Mass+Change+of+Variants?bc=true