Inbound IDoc PO: An error has occurred assigning data (E1BPEKPOC )

Hi,

I am using function module IDOC_INPUT_PORDCR to process inbound IDoc. However, an message reads that "An error has occurred assigning data (E1BPEKPOC)". It is noticed that in the function module, the structure with data for E1BPEKPOC cannot be appended to the internal table for PO_ITEMS. I only filled the following fields: PUR_MAT, MAT_GRP, PLANT, UNIT, NET_PRICE, and PRICE_UNIT.

Regards,

ts