Diagnosis
You are trying to create a reversal document for a document whose periodis closed.
Taking posting date &V1& for the document to be reversed, the systemcould not automatically find an alternative posting date for thereversal document.

System Response
Program termination with error message

Procedure
Check whether postings are possible or should be possible - from periodV2 in fiscal year v3 for closing period v4. if necessary, open anew or old period.