How To Fix WTADDI501 - EDI partner agreement &/& does not exist

WTADDI501 - Overview

• Message type: E = Error

• Message class: WTADDI - Additionals: Messages

• Message number: 501

• Message text: EDI partner agreement &/& does not exist

What causes this issue?

You want to generate an IDoc for
<DS:GLOS.3526BC88AFAB52B9E10000009B38F974>additionals</> that is to be
sent to the system with partner type &V1& and partner number &V2&. This
connection does not exist.

System Response

No additionals IDoc has been generated.

How to fix this error?

Check your entry. If you have the authorization to maintain an entry,
you can do so using transaction WE20 (<DS:TRAN.WE20>execute function
</>).
&HINTS&
You must assign the logical message category to the partner agreement
for the additional.

Error message extract from SAP system. Copyright SAP SE.

WTADDI501 - Details

• The SAP error message:
  WTADDI501 EDI partner agreement &/& does not exist
  typically occurs in the context of SAP's ALE/EDI (Application Link Enabling / Electronic Data Interchange) processing, specifically when dealing with partner profiles and agreements for message exchange.
  
  Cause
  This error means that the system is trying to find an EDI partner agreement for a particular combination of sender and receiver partners and message type, but no such agreement exists in the system.
  
  The placeholders &/& represent the sender and receiver partner IDs (or sometimes message type) that the system is trying to find an agreement for.
  The partner agreement defines the parameters and rules for communication between two partners (e.g., message types allowed, message processing rules).
  If the agreement is missing or incorrectly maintained, the system cannot process the inbound or outbound IDoc or EDI message, resulting in this error.
  
  
  When does it occur?
  
  During inbound or outbound IDoc processing.
  When the system tries to determine the partner