Mannual layout not executing giving Error message

Hi Experts,

When i Try to Execute Planning Layout it giving this Error.

No combination could be generated in step 06

Message no. UPC525

Diagnosis

The planning layout was parameterized so that combinations should be formed for all characteristics of the planning level, in accordance with the maintenance of characteristic relationships. However, in the current step 06 no combination was generated.

System Response

Since no valid combinations can be formed within the selection, manual planning is not possible.

Thanks

Deenu