Hello Spandana,
Error is because in your Get_Entity_Set method there would be no code written to read filter parameter ' SAP__Origin ' . So its dumping.
Put a break point at the code where filters parameters are extracted. There u will find the reason for dump. Reason is SAP__Origin is not read and hence the dump occcured.
Solution would be add one line of code to read it.
Regards,
Ashwin
