How To Fix FL191 - Incompatible enhancement in parameter &1

SAP Error Message - Details

• Message type: E = Error

• Message class: FL - Function Builder messages

• Message number: 191

• Message text: Incompatible enhancement in parameter &1

What causes this issue?

Only compatible enhancements may be carried out when you modify the
interface.
For this reason, all parameters must be optional.
Parameter &V1& is not optional.

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?

Please mark the 'Optional' checkbox for parameter &V1&. Alternatively,
you can specify a suggested value in the case of import and changing
parameters.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FL191 - Incompatible enhancement in parameter &1 ?

  The SAP error message FL191, which states "Incompatible enhancement in parameter &1," typically occurs in the context of Financial Accounting (FI) or related modules when there is a mismatch or incompatibility in the enhancement or configuration settings for a specific parameter.
  Cause:
  
  Incompatible Enhancements: The error usually arises when there are conflicting enhancements or modifications applied to a particular parameter. This can happen if different enhancements are trying to modify the same functionality or if an enhancement is not compatible with the current system configuration.
  Configuration Issues: Incorrect or incomplete configuration settings in the system can lead to this error. This might include missing or incorrectly set parameters in the configuration of the financial module.
  Transport Issues: If enhancements or configurations were transported from one system to another (e.g., from development to production), there might be inconsistencies that lead to this error.
  
  Solution:
  
  Check Enhancements: Review the enhancements applied to the parameter indicated in the error message. Ensure that there are no conflicting enhancements. You may need to deactivate or adjust one of the enhancements to resolve the conflict.
  Review Configuration: Go through the configuration settings related to the financial module and the specific parameter. Ensure that all settings are correctly configured and compatible with each other.
  Transport Management: If the issue arose after a transport, check the transport logs for any errors or warnings. Ensure that all necessary objects were transported correctly and that there are no missing dependencies.
  Consult Documentation: Refer to SAP documentation or notes related to the specific enhancement or parameter to understand any known issues or compatibility requirements.
  Debugging: If you have access to debugging tools, you can trace the execution to identify where the incompatibility arises. This may provide insights into which enhancement or configuration is causing the issue.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues related to the error message FL191. SAP frequently updates its knowledge base with solutions and workarounds for common errors.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed. Other users may have encountered the same error and can provide insights or solutions.
  SAP Support: If the issue persists and you cannot find a resolution, consider reaching out to SAP Support for assistance. They can provide more detailed analysis and support based on your specific system configuration.
  
  By following these steps, you should be able to identify the cause of the FL191 error and implement a solution to resolve it.