SAP Message 29510 - & Material & not found in BOMs

Diagnosis
One of the following situations triggered this message:
RESET N1
The material has not yet been used in BOMs.
You have entered restrictions on validity and the material is notrecorded as a BOM component under these restrictions.

Procedure
In order to check whether the material has been used in BOMs at all,delete your entry for validity by entering "!" at the beginning of thefield.