DBIF_RSQL_INVALID_CURSOR Error while using SELECT ENDSELECT

Hello Experts,

I am having an ABAP report that selects data from BKPF in batches using SELECT ENDSELECT statement with PACKAGE SIZE option.

First select passes fine, on reaching the ENDSELECT and doing the 2nd  iteration SELECT statement is creating a DUMP: DBIF_RSQL_INVALID_CURSOR.

I checkd some links and SCN posts. There is no COMMIT . BREAK-POINT in between.

Its an emergency as its affecting a critical deliverable.

Can you please help?

Thanks,

LT