Diagnosis
The planning layout was parameterized so that combinations should beformed for all characteristics of the planning level, in accordancewith the maintenance of characteristic relationships. However, in thecurrent step &V1& no combination was generated.

System Response
Since no valid combinations can be formed within the selection, manualplanning is not possible.,,,,

Procedure
If required, correct the settings for step &V1& in the context of thecurrent planning area &V2&, in the maintenance of the characteristicrelationships.