
I found the purchase Receipt Header contain only PO No. and I ready want to find out where is the PI No. ?
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I have the same question (0)There is no direct link between those documents, as the relation might not be always one-to-one. E.g., you might have several partial receipts from the same order which would be invoiced only once. Thus, you might have several receipts and just one invoice.
You can trace it through items transactions: posted receipt generates transactions in Item Ledger Entry table, and posted invoice generates transactions in Value Entry table, with corresponding Document Nos. Those tables are linked via item transaction number.