How To Fix UPF026 - Enter a valid function module

SAP Error Message - Details

• Message type: E = Error

• Message class: UPF - Planning Functions

• Message number: 026

• Message text: Enter a valid function module

What causes this issue?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Check if the function module is valid. Display the valid function
modules using the F4 Help.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UPF026 - Enter a valid function module ?

  The SAP error message UPF026 ("Enter a valid function module") typically occurs when a user is trying to execute a function module in the SAP system, but the specified function module is either invalid, does not exist, or is not accessible due to authorization issues.
  Causes:
  
  Invalid Function Module Name: The function module name entered may be misspelled or does not exist in the system.
  Authorization Issues: The user may not have the necessary authorizations to access the specified function module.
  Transport Issues: The function module may not have been transported correctly to the system, or it may exist in a different system (e.g., development vs. production).
  Namespace Issues: The function module may be in a different namespace that the user does not have access to.
  
  Solutions:
  
  
  Check Function Module Name:
  
  Verify that the function module name is spelled correctly and exists in the system. You can do this by using transaction code SE37 (Function Builder) to search for the function module.
  
  
  
  Check Authorizations:
  
  Ensure that the user has the necessary authorizations to execute the function module. This can be checked by reviewing the user's roles and authorizations in transaction code SU53 or by consulting with your security team.
  
  
  
  Transport Verification:
  
  If the function module was recently created or modified, ensure that it has been transported correctly to the system you are working in. Check the transport logs for any issues.
  
  
  
  Namespace Check:
  
  If the function module is in a custom namespace, ensure that the user has access to that namespace. You may need to consult with your SAP Basis or development team.
  
  
  
  Debugging:
  
  If you have access to debugging tools, you can set a breakpoint in the code that calls the function module to see if there are any additional issues or parameters being passed incorrectly.
  
  
  
  Consult Documentation:
  
  If the function module is part of a standard SAP package, refer to the SAP documentation or notes for any known issues or updates related to that function module.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SE37: Function Builder - to check the existence and details of the function module.
  SU53: Authorization Check - to analyze authorization issues.
  SE80: Object Navigator - to explore related objects and dependencies.
  
  
  
  SAP Notes: Check the SAP Support Portal for any relevant notes that might address specific issues related to the function module in question.
  
  
  Community Forums: SAP Community and other forums can be helpful for finding similar issues faced by other users and potential solutions.
  
  
  If the issue persists after trying the above solutions, it may be beneficial to reach out to your SAP support team for further assistance.