Hi Shylaja
There is a Pilot Note 1965338 which 'may' solve your issue.....Not sure if it is applicable for your system release or not.
It deals with corrections in class CL_SWF_RUN_RESTART_HANGUP_ITMS, method SELECT_ITEMS.
Check if the note correction instructions are of any help to you....you can setup a break point here, run report SWWERRE and debug to change contents ls_witype-low and see if RSWWERRE gives any error or not.
regards,
Modak