Diagnosis
Since you entered a material for which a BOM already exists, a newalternative is created for the existing BOM (-> multiple BOM).
This means that now you cannot create variants for this material.

System Response
If you entered an alternative, the alternative you entered is created(provided it does not already exist). If you didn't, the systemdetermines the next available alternative and enters this as a default.
Note:
An alternative is exploded according to various criteria: in thematerial master via the Alternative selection field, and in theBOM via the lot size. You can also use the application to determinethat a specific alternative is exploded as of a certain date.
These settings may mean that no alternative is exploded.

Procedure
If you want to confirm creation of a multiple BOM, press ENTER.