Diagnosis
You want to create a variant BOM.
The material you want to create a variant for has the base unit ofmeasure &V1&. The material for which the variant BOM was first createdhas the base unit of measure &V2&.

System Response
The system checks whether the base units of measure of the materialsare the same.

Procedure
As the base units of measure are different in this case, you cannotcreate a variant of the selected variant BOM for the material required.