How To Fix OL111 - Interface changes no longer allowed (see long text)

SAP Error Message - Details

• Message type: E = Error

• Message class: OL - Workflow object types: Run-time system

• Message number: 111

• Message text: Interface changes no longer allowed (see long text)

What causes this issue?

Since the BOR contents are to be transferred into the
class library, no more interface changes to object types
are allowed For Release 5.0.

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

System Response

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OL111 - Interface changes no longer allowed (see long text) ?

  The SAP error message OL111, which states "Interface changes no longer allowed (see long text)," typically occurs when there are attempts to modify the interface of a function module or method that is already in use. This can happen in various scenarios, such as when you try to change the parameters of a function module that has already been released or is being used in other programs or function modules.
  Cause:
  
  Interface Changes: The primary cause of this error is an attempt to change the interface (input/output parameters) of a function module or method that has already been activated and is in use.
  Dependencies: If the function module is being called by other programs, classes, or function modules, changing its interface can lead to inconsistencies and errors in those dependent objects.
  Transport Requests: If the function module is part of a transport request that has already been released, you cannot make changes to its interface.
  
  Solution:
  
  Check Dependencies: Before making any changes, check if the function module or method is being used in other programs or function modules. You can use transaction SE80 or SE37 to analyze dependencies.
  Create a New Version: If you need to change the interface, consider creating a new version of the function module or method instead of modifying the existing one. This way, you can maintain backward compatibility.
  Use a Wrapper Function: If you need to add new functionality, you can create a wrapper function that calls the original function module and handles the new parameters.
  Documentation: Review the long text of the error message for specific details and guidelines provided by SAP regarding the changes you are trying to make.
  Transport Management: If the function module is part of a transport request, ensure that the request is not released. If it is, you may need to revert the changes or create a new transport request for the new version.
  
  Related Information:
  
  Transaction Codes: Use SE37 (Function Builder) or SE80 (Object Navigator) to view and manage function modules.
  SAP Notes: Check for any relevant SAP Notes that might provide additional insights or solutions related to this error.
  Best Practices: Follow best practices for versioning and managing function modules to avoid such issues in the future. This includes proper documentation and communication with your development team regarding changes to shared interfaces.
  
  By following these steps, you should be able to resolve the OL111 error and manage your function modules effectively.