Hi Ludwig,
Yes, we are able to find the Voucher from Invoice Approval Journal.
What we did is, we reversed the Invoice Pool Entry via Invoice Approval Journal by selecting the corresponding Voucher. Post reversing, we again made the Invoice Register for the same after which too when we are trying to post the Invoice Pool entry, we are still getting the same issue.
As per my findings after I debugged the scenario, the corresponding record is not present in the SourceDocumentLine table due to which it is throwing error.(As explained above)
Just few more details of what I tried: I tried to create new PO and received the new PO, then created the Invoice Register and posted from the Invoice Pool. I am able to post it without any issues. And in my sample test, I even cross checked the corresponding entry does exist in the SourceDocumentLine table.
Sincerely,
Muneeb