How To Fix /IWFND/CM_MGW453 - Function Module &1 does not exist

/IWFND/CM_MGW453 - Overview

• Message type: E = Error

• Message class: /IWFND/CM_MGW -

• Message number: 453

• Message text: Function Module &1 does not exist

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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/IWFND/CM_MGW453 - Details

• The SAP error message /IWFND/CM_MGW453 Function Module &1 does not exist typically occurs in the context of SAP Gateway services when the system is unable to find a specified function module that is expected to be called during the execution of an OData service. This can happen for several reasons, and here are some common causes, solutions, and related information:
  Causes:
  
  Function Module Not Created: The function module that is referenced in the OData service is not created or activated in the SAP system.
  Incorrect Naming: There might be a typo or incorrect naming in the service definition or the function module itself.
  Transport Issues: If the function module was recently transported from another system, it may not have been transported correctly or may not exist in the target system.
  Authorization Issues: The user executing the service may not have the necessary authorizations to access the function module.
  Service Registration Issues: The OData service may not