Whse no. & not maintained for reference mat. &

What causes this issue?

The reference material &V2& does not yet have any warehouse management
data for warehouse number &V1&.

How to fix this error?

INCLUDE NA_DATEN_PRUEFEN
If your data is correct, create the material master record for
warehouse number &V1&.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.