SAP Note 26222 - RFWERE00 - Posting foreign currency is not possible

Symptom:

RFWERE00 posts with correct allocation number (purchase order number and item) at the key date. The clearing is to be with FB05 at the reversal date. The session cannot be processed because an incorrect document is selected.

Cause and prerequisites

Program error. This error only occurs if the "Posting in foreign currency" parameter is selected.

Solution
Start RFWERE00 without "Posting in foreign currency" or make the following correction.
Read the program documentation again: You generally do not require the "Posting in foreign currency" transaction.