How To Fix VN025 - Output & for medium &, partner function & is not defined

SAP Error Message - Details

• Message type: E = Error

• Message class: VN - Nachrichtensteuerung

• Message number: 025

• Message text: Output & for medium &, partner function & is not defined

What causes this issue?

You have selected a combination of output and partner function which
has not been defined.

How to fix this error?

INCLUDE NA_EINGABE_PRUEFEN
This is a warning message. You can proceed by pressing ENTER.
To prevent the warning message from appearing again, assign the
required partner function to your output type in table TNAPN.

<DS:TRAN.NACT>Execute function</>
ENDIF

Error message extract from SAP system. Copyright SAP SE.