Diagnosis
You set the 'always on material group basis' indicator and also entereda value-only material. In this case, the system is not able to decidewhich of the two entries it should use.

System Response
If the 'always on material group basis' indicator is set, the systemuses the material group material of the current material group as thedefault value.
If you entered a value-only material, this is entered after the checkfor the selected material groups.

Procedure
Deselect the indicator or delete the entry for the value-only material.