How To Fix WTADDI257 - & is not a valid supplier for requesting additionals via BAPI

SAP Error Message - Details

• Message type: E = Error

• Message class: WTADDI - Additionals: Messages

• Message number: 257

• Message text: & is not a valid supplier for requesting additionals via BAPI

What causes this issue?

Vendor &V1& has attempted to request an additionals IDoc for an
additionals document via BAPI. This vendor is not allowed to use this
function.

System Response

The additionals IDoc is not generated.

How to fix this error?

First check your entries.
If you are still sure that you have entered the correct vendor, you can
make the necessary changes to the additionals vendor directly in the
additionals monitor. Then you can start the BAPI call again.

Error message extract from SAP system. Copyright SAP SE.