How To Fix /PM0/3FT_MESSAGES026 - Function &1 has already been defined

SAP Error Message - Details

• Message type: E = Error

• Message class: /PM0/3FT_MESSAGES -

• Message number: 026

• Message text: Function &1 has already been defined

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PM0/3FT_MESSAGES026 - Function &1 has already been defined ?

  The SAP error message /PM0/3FT_MESSAGES026 Function &1 has already been defined typically indicates that there is an attempt to define a function or a method in the system that has already been defined previously. This can occur in various contexts, such as when working with function modules, methods in classes, or other programmatic constructs within SAP.
  Cause:
  
  
  Duplicate Definition: The most common cause is that the function or method name you are trying to define already exists in the system. This could be due to:
  
  A previous definition in the same program or package.
  An attempt to create a function with the same name as an existing standard SAP function or a function defined in another program.
  
  
  
  Transport Issues: If you are working in a development environment and have transported objects from another system, there may be conflicts with existing definitions.
  
  
  Namespace Conflicts: If you are using a custom namespace, ensure that there are no conflicts with standard SAP namespaces.
  
  
  Solution:
  
  
  Check Existing Definitions: 
  
  Use transaction SE37 (Function Builder) or SE80 (Object Navigator) to search for the function or method name (&1 in the error message). 
  Ensure that the name is not already in use.
  
  
  
  Rename the Function: If you find that the function name is already in use, consider renaming your function or method to something unique.
  
  
  Review Transport Requests: If the issue arose after a transport, check the transport requests to ensure that there are no conflicting definitions being transported.
  
  
  Clear Buffer: Sometimes, clearing the buffer can help if the system is not recognizing the latest changes. You can do this by using transaction code /n/SAPAPO/OM or /n/SAPAPO/OM to refresh the buffer.
  
  
  Check for Active Versions: Ensure that there are no active versions of the function that might be causing the conflict. You can check this in the function builder.
  
  
  Consult Documentation: If you are working with a specific SAP module or enhancement, consult the relevant documentation or SAP Notes for any known issues or guidelines.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific issues related to the error message. You can search for the error message number or keywords related to your issue.
  Development Guidelines: Follow best practices for naming conventions and object definitions in SAP to avoid such conflicts in the future.
  Debugging: If you are unsure where the conflict is coming from, you can use debugging tools to trace the execution and see where the function is being called or defined.
  
  By following these steps, you should be able to resolve the error and prevent it from occurring in the future.