Message SAP WXP678 - You cannot convert a store into a customer

Diagnosis
You have tried to create an allocation table in manual planning. In theinterface, you configured your system so that the system is convertedusing customers. Plant &V1& could not be converted.

System Response
The allocation table cannot be created.

Procedure
Check the customer data and the plant data.
Check if the indicator for converting the plant to customer must beset. This must only be done if you have entered the plant or plantgroup as the plant dimension.