Diagnosis
The document does not come from a payment or check lot. No clarificationcase can be created for an incoming payment. Therefore, posting theclearing amount to the clarification account for incoming payments isnot permitted.
You cannot create clarification cases for documents posted via the cashdesk or the cash journal, since no clarification posting is possible forthe relevant lot.

System Response
Error message

Procedure
Choose an alternative method for posting the clearing amount.