How To Fix EU801 - Function module & already exists

EU801 - Overview

• 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