SAP Message 63137 - The settlement unit &2 &3 is no longer valid as of date &1

Diagnosis
You are trying to call up settlement unit &V2& &V3& with date &V1&.This settlement unit is no longer valid for this date.

System Response
Access to this settlement unit is denied.

Procedure
You cannot process a temporary settlement unit after the end of itsvalidity. The settlement is considered non-existent.