How To Fix U6156 - Solution &1: &2 is not a valid ABAP function module

SAP Error Message - Details

• Message type: E = Error

• Message class: U6 - Message Class for BRE

• Message number: 156

• Message text: Solution &1: &2 is not a valid ABAP function module

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message U6156 - Solution &1: &2 is not a valid ABAP function module ?

  The SAP error message U6156 indicates that the specified ABAP function module is not valid or cannot be found in the system. This error can occur for various reasons, and understanding the cause and potential solutions can help resolve the issue.
  Causes of Error U6156
  
  
  Non-Existent Function Module: The function module you are trying to call does not exist in the SAP system. This could be due to a typo in the function module name or because it has not been created or activated.
  
  
  Transport Issues: If the function module was recently transported from another system, it may not have been successfully imported or activated in the target system.
  
  
  Authorization Issues: The user executing the function may not have the necessary authorizations to access the function module.
  
  
  Namespace Issues: If the function module is in a specific namespace and the calling program does not have access to that namespace, it may lead to this error.
  
  
  System Configuration: There may be configuration issues in the SAP system that prevent the function module from being recognized.
  
  
  Solutions to Error U6156
  
  
  Check Function Module Name: Verify that the function module name is spelled correctly in the code. You can do this by navigating to the function module in transaction SE37 or SE80.
  
  
  Check Existence: Use transaction SE37 to check if the function module exists. If it does not, you may need to create it or ensure it is properly transported from another system.
  
  
  Transport Management: If the function module was recently transported, check the transport logs to ensure that it was imported successfully. You may need to re-import the transport request.
  
  
  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.
  
  
  Namespace Access: If the function module is in a specific namespace, ensure that the calling program has access to that namespace. You may need to adjust the configuration or permissions.
  
  
  Debugging: If you have access to the ABAP debugger, you can set breakpoints to see where the error occurs and gather more information about the context in which the function module is being called.
  
  
  Consult Documentation: If the function module is part of a standard SAP package or enhancement, consult the relevant SAP documentation or notes for any known issues or additional configuration steps.
  
  
  Related Information
  
  
  Transaction Codes:
  
  SE37: Function Module Maintenance
  SE80: Object Navigator
  SU53: Authorization Check
  ST22: Dump Analysis (if applicable)
  
  
  
  SAP Notes: Check the SAP Support Portal for any relevant notes that may address this specific error or provide additional troubleshooting steps.
  
  
  Community Forums: Consider searching or posting on SAP community forums or platforms like SAP Community, Stack Overflow, or other SAP-related discussion boards for additional insights from other users who may have encountered the same issue.
  
  
  By following these steps, you should be able to identify the cause of the U6156 error and implement a suitable solution.