Diagnosis
At present only &V1& characteristic combinations can be edited permanual planning call. However, for the action you desired, &V2&characteristic combinations would have had to be edited. You have useda selection that was not restricted enough and possibly in addition setthe indicator 'from possible characteristic combinations' in theplanning layout.

System Response
Manual planning cannot be executed.

Procedure
Restrict the selection sufficiently, in particular for thecharacteristics in the header area and in the lead columns of theplanning layout.