How To Fix MDG_OIF204 - Function module name &1 is already in use; use a different name

SAP Error Message - Details

• Message type: E = Error

• Message class: MDG_OIF - Message Class for Outbound Interface

• Message number: 204

• Message text: Function module name &1 is already in use; use a different name

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MDG_OIF204 - Function module name &1 is already in use; use a different name ?

  The SAP error message MDG_OIF204 indicates that a function module you are trying to create or modify is already in use, and therefore, you need to choose a different name for it. This error typically occurs in the context of SAP Master Data Governance (MDG) when you are working with function modules in the Object-Oriented ABAP environment.
  Cause:
  
  Function Module Already Exists: The function module name you are trying to use is already taken by another function module in the SAP system.
  Naming Conflicts: There may be naming conventions or restrictions in place that prevent the use of certain names.
  Transport Requests: If you are working in a development environment, the function module might be locked due to an active transport request.
  
  Solution:
  
  Choose a Different Name: The simplest solution is to select a different name for your function module that adheres to the naming conventions of your organization and does not conflict with existing names.
  Check Existing Function Modules: Use transaction code SE37 (Function Builder) to search for existing function modules. This will help you identify if the name you want to use is already in use.
  Review Transport Requests: If the function module is locked due to a transport request, you may need to wait until the transport is released or check with your Basis team to unlock it.
  Naming Conventions: Ensure that the name you are trying to use follows the naming conventions set by your organization or SAP. Typically, custom function modules should start with a prefix (e.g., Z or Y) to avoid conflicts with standard SAP function modules.
  
  Related Information:
  
  Transaction Codes: 
  
  SE37: Function Builder - to create or modify function modules.
  SE80: Object Navigator - to explore various objects including function modules.
  
  
  SAP Notes: Check for any relevant SAP Notes that might provide additional context or solutions related to this error.
  Documentation: Review the SAP documentation for Master Data Governance and function module creation to ensure compliance with best practices.
  
  By following these steps, you should be able to resolve the MDG_OIF204 error and successfully create or modify your function module.