EDI: Outbound partner profile process code does not exist

What causes this issue?

An outbound partner profile could not be found with the following key:
&v1&
This involves the key fields of table EDP12:
-RCVPRN partner number of receiver
-RCVPRT partner type of receiver
-RCVPFC partner function of receiver
-KAPPL application for message condition
-KSCHL message
-AENDE change message flag

System Response

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

How to fix this error?

Please check the outbound partner profiles for the assignment of the
process code:
IF &DEVICE&='SCREEN'
<ds:TRAN.WE20>Execute function</>
ENDIF

Error message extract from SAP system. Copyright SAP SE.