How To Fix E0559 - '&' is not a function module

SAP Error Message - Details

• Message type: E = Error

• Message class: E0 - SAP EDI messages

• Message number: 559

• Message text: '&' is not a function module

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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Smart SAP Assistant

• What is the cause and solution for SAP error message E0559 - '&' is not a function module ?

  The SAP error message E0559, which states that '&' is not a function module, typically occurs when there is an attempt to call a function module that does not exist or is incorrectly referenced in the code. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Incorrect Function Module Name: The name of the function module being called is misspelled or does not exist in the SAP system.
  Function Module Not Activated: The function module may exist but is not activated or has not been properly released.
  Namespace Issues: If the function module is in a different namespace, it may not be accessible from the current context.
  Transport Issues: If the function module was recently transported from another system, it may not have been imported correctly.
  Authorization Issues: The user may not have the necessary authorizations to access the function module.
  
  Solutions:
  
  Check Function Module Name: Verify the spelling and ensure that the function module name is correct. You can do this by using transaction code SE37 (Function Builder) to search for the function module.
  Activate the Function Module: If the function module exists but is not activated, activate it in SE37.
  Check Namespace: Ensure that you are using the correct namespace if the function module is part of a custom development.
  Transport Check: If the function module was recently transported, check the transport logs to ensure it was imported successfully.
  Authorization Check: Ensure that the user has the necessary authorizations to execute the function module. You can check this in transaction SU53 after the error occurs.
  Debugging: If you are calling the function module from ABAP code, you can set breakpoints and debug to see where the error occurs and what the actual value of the function module name is at runtime.
  
  Related Information:
  
  Transaction Codes:
  
  SE37: Function Module Builder
  SE80: Object Navigator (to check for related objects)
  SU53: Authorization Check
  
  
  Documentation: Review SAP documentation or help files related to function modules for additional context.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  
  By following these steps, you should be able to identify the cause of the E0559 error and implement a solution. If the issue persists, consider reaching out to your SAP Basis or development team for further assistance.