Diagnosis
You want to schedule the assignment in line &V1&<(>&<)>V1<(>&<)> withoutdefining a successor. However, this is only possible for assignmentsthat have already been released.

System Response
The action is not performed.

Procedure
When released assignments are scheduled, the end of the validity periodis set and the release status is set to enable this assignment to bereexported to operational systems. This step is not needed for plannedassignments, as the assignments are not yet known in operationalsystems. In this case, the planned assignment should either be deleted,or the end date set manually.