How To Fix B1535 - Function module & already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: B1 - ALE group messages

• Message number: 535

• Message text: Function module & already exists

What causes this issue?

The function module already exists. It cannot be generated.

How to fix this error?

If you want to replace the existing function module, you must first
delete it. If the function module contains manual tailoring, this
should first be saved. The function module can be deleted in the
Function Builder (Transaction SE37).
If the existing module is not to be replaced, please select another
name.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message B1535 - Function module & already exists ?

  The SAP error message B1535, which states "Function module & already exists," typically occurs when there is an attempt to create a function module in the SAP system that already exists with the same name. This can happen during development or when importing objects from a transport request.
  Cause:
  
  Duplicate Function Module: The function module you are trying to create has the same name as an existing function module in the system.
  Transport Issues: If you are importing a transport request that contains a function module with a name that already exists in the target system, this error can occur.
  Development Environment: If multiple developers are working on the same function module or if there are inconsistencies between development and production environments.
  
  Solution:
  
  
  Check Existing Function Modules: 
  
  Use transaction code SE37 (Function Builder) to check if the function module already exists. If it does, you may need to modify the existing function module instead of creating a new one.
  
  
  
  Rename the Function Module: 
  
  If you need to create a new function module, consider renaming it to avoid the conflict with the existing one.
  
  
  
  Transport Request Review: 
  
  If the error occurs during a transport, review the transport request to ensure that it does not contain duplicate entries. You may need to adjust the transport request or remove the conflicting function module.
  
  
  
  Check Development Objects: 
  
  Ensure that your development environment is synchronized with the production environment. If there are discrepancies, you may need to resolve them before proceeding.
  
  
  
  Consult Documentation: 
  
  Review any relevant documentation or guidelines for naming conventions and object management in your SAP environment to avoid future conflicts.
  
  
  
  Related Information:
  
  Transaction Codes: 
  
  SE37: Function Builder
  SE80: Object Navigator
  SE09/SE10: Transport Organizer
  
  
  SAP Notes: Check for any SAP Notes related to this error message for additional insights or patches that may address the issue.
  Development Guidelines: Follow best practices for naming conventions and object management to minimize the risk of such conflicts in the future.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or development team for further assistance.