I am using program RFBIBL00 to generate a batch input session for posting documents. I am posting through FB05 transaction. I used PROJK field of BBSEG structure to pass WBS Element. Its throwing an error saying '00349 Field COBL-PS_PSP_PNR . does not exist in the screen SAPLKACB 0002'. Which field in BBSEG structure should be used to pass WBS Element.