How To Fix EU801 - Function module & already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: EU - Development Environment

• Message number: 801

• Message text: Function module & already exists

What causes this issue?

You attempted to create a function module using a name that already
exists in the function library.

System Response

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

How to fix this error?

If you want to create a new function module, choose a different name.
If you want to edit an existing function module, use the change
function.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message EU801 - Function module & already exists ?

  The SAP error message EU801, which states that a function module already exists, typically occurs when there is an attempt to create or activate a function module that has the same name as an existing one in the SAP system. This can happen during development or when transporting objects between systems.
  Cause:
  
  Duplicate Function Module: The most common cause is that a function module with the same name already exists in the system.
  Transport Issues: If you are transporting objects from one system to another, there may be a conflict if the function module already exists in the target system.
  Development Environment: In a development environment, multiple developers might inadvertently create function modules with the same name.
  
  Solution:
  
  
  Check for Existing Function Module:
  
  Use transaction code SE37 (Function Builder) to search for the function module by name. If it exists, you may need to modify the existing one instead of creating a new one.
  
  
  
  Rename the Function Module:
  
  If you are developing a new function module and it conflicts with an existing one, consider renaming your function module to something unique.
  
  
  
  Transport Management:
  
  If the error occurs during a transport, ensure that the function module is not already present in the target system. You may need to adjust your transport request or remove the conflicting function module from the transport.
  
  
  
  Check for Naming Conventions:
  
  Ensure that you are following the naming conventions and guidelines set by your organization to avoid conflicts.
  
  
  
  Delete or Deactivate:
  
  If the existing function module is no longer needed, you can delete or deactivate it (if you have the necessary authorizations) to resolve the conflict.
  
  
  
  Related Information:
  
  Function Module Naming: SAP function modules typically follow a naming convention that includes a prefix indicating the development object or the application area. Ensure that your naming is unique.
  Transport Requests: Familiarize yourself with how transport requests work in SAP, as this can help prevent conflicts when moving objects between systems.
  Development Guidelines: Follow your organization’s development guidelines to avoid naming conflicts and ensure proper version control.
  
  If the issue persists after trying the above solutions, it may be helpful to consult with your SAP Basis team or a developer with experience in SAP function modules for further assistance.