Copying text from CMIR (KNMT) to the Sales Order Line Item

We need to copy text from the CMIR (KNMT) to the Sales Order Line Item with two steps in the access sequence. First to look up by the Ship to Partner Function. If doesn't exist, then look up by Sold to Partner Function. Have setup a new text id (ZPRN), a new access seq (9011). The access seq has one seq =5 for KNMT, ZPRN, all languages and that saves fine. When I set the Partner Function to be SH. I get the following error msg:

"The Language does not come from the partner function AG for MVKE".

Any ideas? This access seq does not reference MVKE. It only references KNMT.

Thanks!