How To Fix 0D126 - Function module for event &1 is not defined

0D126 - Overview

• Message type: E = Error

• Message class: 0D - FS-CD General Messages

• Message number: 126

• Message text: Function module for event &1 is not defined

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Error message extract from SAP system. Copyright SAP SE.

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• What is the cause and solution for SAP error message 0D126 - Function module for event &1 is not defined ?

  The SAP error message "0D126 Function module for event &1 is not defined" typically indicates that there is an issue with a function module that is expected to handle a specific event in the SAP system, but it has not been defined or is not available.
  
  Cause:
  
  Missing Function Module: The function module that is supposed to handle the event specified by &1 is not created or does not exist in the system.
  Incorrect Configuration: The event might be incorrectly configured in the system, leading to the system looking for a non-existent function module.
  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.
  Development Issues: If the function module was supposed to be developed but was not completed or activated.
  
  
  Solution:
  
  Check Function Module: Verify if the function module for the specified event exists in the system. You can