How To Fix MDGBP045 - Function module &2 is already assigned to event &1

SAP Error Message - Details

• Message type: E = Error

• Message class: MDGBP - Master Data Governance: Business Partner specific messages

• Message number: 045

• Message text: Function module &2 is already assigned to event &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MDGBP045 - Function module &2 is already assigned to event &1 ?

  The SAP error message MDGBP045 indicates that a function module is already assigned to a specific event in the system. This typically occurs in the context of event-driven programming within SAP, where certain function modules are expected to respond to specific events. When you try to assign a function module to an event that already has a function module assigned, this error is triggered.
  Cause:
  
  Duplicate Assignment: The function module you are trying to assign is already linked to the specified event.
  Configuration Error: There may be a misconfiguration in the event handling setup, leading to attempts to assign the same function module multiple times.
  Development Error: If you are developing or customizing functionality, you might have inadvertently tried to register the same function module for the same event.
  
  Solution:
  
  
  Check Existing Assignments: 
  
  Go to the relevant configuration or customization transaction where event assignments are managed (e.g., transaction codes like SM30 or SE80).
  Look for the event in question and see which function module is currently assigned to it.
  
  
  
  Remove or Change Assignment:
  
  If the existing assignment is not needed, you can remove it.
  If you need to use a different function module, ensure that you are assigning the correct one and that it is not already in use.
  
  
  
  Review Custom Code:
  
  If you are working with custom developments, review your code to ensure that you are not unintentionally trying to register the same function module multiple times.
  
  
  
  Consult Documentation: 
  
  Check SAP documentation or notes related to the specific event and function module to understand the expected behavior and any constraints.
  
  
  
  Testing: 
  
  After making changes, test the event handling to ensure that it works as expected without triggering the error.
  
  
  
  Related Information:
  
  Event Handling in SAP: Understanding how events and function modules interact in SAP can help prevent such errors. Familiarize yourself with the event-driven architecture in the specific module you are working with.
  SAP Notes: Search for relevant SAP Notes that might address this specific error or provide additional context or solutions.
  SAP Community: Engaging with the SAP Community can provide insights from other users who may have encountered and resolved similar issues.
  
  If the problem persists after following these steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.