How To Fix PAK109 - Package interface prefix &1 is already in use

SAP Error Message - Details

• Message type: E = Error

• Message class: PAK - Package API / Package Tools

• Message number: 109

• Message text: Package interface prefix &1 is already in use

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message PAK109 - Package interface prefix &1 is already in use ?

  The SAP error message PAK109 indicates that the package interface prefix you are trying to use is already in use by another package. This typically occurs when you are attempting to create or modify a package interface in the ABAP Workbench (SE80) or when working with transport requests.
  Cause:
  
  Duplicate Prefix: The prefix you are trying to assign to your package interface is already assigned to another package interface.
  Naming Convention: SAP has specific naming conventions and restrictions for package interfaces, and using an already existing prefix violates these rules.
  
  Solution:
  To resolve the PAK109 error, you can take the following steps:
  
  
  Check Existing Prefixes:
  
  Use transaction SE80 or SE11 to check the existing package interfaces and their prefixes. Look for the prefix you are trying to use and confirm that it is indeed in use.
  
  
  
  Choose a Different Prefix:
  
  If the prefix is already in use, you will need to select a different, unique prefix for your package interface. Ensure that the new prefix adheres to SAP's naming conventions.
  
  
  
  Modify Existing Package Interface:
  
  If you have control over the existing package interface that is using the prefix, consider modifying it to free up the prefix you want to use. However, be cautious as this may affect other dependent objects.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or guidelines regarding package interfaces and naming conventions to ensure compliance.
  
  
  
  Transport Request:
  
  If this error occurs during a transport request, ensure that the transport request is correctly configured and that there are no conflicts with existing objects.
  
  
  
  Related Information:
  
  Transaction Codes: SE80 (Object Navigator), SE11 (Data Dictionary), SE37 (Function Modules), SE24 (Class Builder).
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  Naming Conventions: Familiarize yourself with SAP's naming conventions for package interfaces to avoid similar issues in the future.
  
  By following these steps, you should be able to resolve the PAK109 error and successfully create or modify your package interface.