Receiving the following error messages in SRM PO

Dear SRM experts,

My client is on SRM 7.0 with ECC 6 Back End R/3 using the ECS Scenario..

My client is trying to order the SRM PO from SRM portal to back end ECC..He recieves the following error messages:-SRM PO not transferred to R/3 ECC..

No Address found for Partner Function Type 0002

No Address found for Partner Function Type 0013

Both are Hard errors & not allowing user to proceed.

I tried to delete the PO in the SRM portal & order..Still same error

Also, I checked user 's assignment validity in PPOSA_BBP..

User position S is valid before/after PO creation date..Also End User assignment to the Org unit /Company of the PO is valid..

Unable to check on furher

Pl advise further .

BR//Ranganath