C2168 - Internal: Error due to repeated generation of a function selection

SAP Error Message - Details

• Message type: E = Error

• Message class: C2 - Other messages production orders

• Message number: 168

• Message text: Internal: Error due to repeated generation of a function selection

What causes this issue?

A second attemp was made to generate a function entry for the same key.
There is probably an error in the program flow of one of the selected
functions.

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?

You should contact your systems administrator. If the error occurred
when executing a standard function the error must be investigated by
SAP.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

AnswerBot

• What is the cause and solution for SAP error message C2168 - Internal: Error due to repeated generation of a function selection ?

  The SAP error message C2168, which states "Internal: Error due to repeated generation of a function selection," typically occurs in the context of ABAP programming or when working with function modules. This error indicates that there is an issue with the generation of a function selection screen, which may be caused by various factors.
  Causes:
  
  
  Repeated Function Generation: The error often arises when a function module or a function group is being generated multiple times in a way that is not allowed. This can happen if there are circular dependencies or if the function module is being called recursively without proper termination.
  
  
  Inconsistent State: The system might be in an inconsistent state due to previous errors or incomplete transactions, leading to issues when trying to generate the function selection screen.
  
  
  Transport Issues: If there are transport requests that have not been properly imported or have been partially imported, it can lead to inconsistencies in the function modules.
  
  
  Development Environment Issues: Sometimes, issues in the development environment, such as missing authorizations or incorrect settings, can lead to this error.
  
  
  Solutions:
  
  
  Check for Circular Dependencies: Review the function modules and function groups involved to ensure there are no circular dependencies. Refactor the code if necessary to eliminate these dependencies.
  
  
  Clear Buffer: Sometimes, clearing the buffer can help resolve internal errors. You can do this by using transaction code SM12 to delete any locks or SM21 to check the system log for any related issues.
  
  
  Re-Generate Function Module: Try to manually re-generate the function module or function group. You can do this by going to the function module in the ABAP Workbench (SE37) and clicking on the "Activate" button.
  
  
  Check Transport Requests: Ensure that all transport requests related to the function module have been properly imported. If there are any inconsistencies, resolve them by re-importing the transport requests.
  
  
  Debugging: If the issue persists, consider debugging the function module to identify the exact point of failure. Use transaction SE80 or SE37 to set breakpoints and analyze the flow of execution.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error. There may be patches or updates that resolve known issues.
  
  
  Contact SAP Support: If none of the above solutions work, consider reaching out to SAP Support for further assistance. Provide them with detailed information about the error, including any relevant logs or screenshots.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE37 (Function Module), SE80 (Object Navigator), and SM21 (System Log).
  ABAP Development: Understanding ABAP programming concepts, especially related to function modules and function groups, can help in troubleshooting this error.
  System Logs: Always check the system logs for any additional error messages or warnings that might provide more context about the issue.
  
  By following these steps, you should be able to diagnose and resolve the C2168 error in SAP.