How To Fix MN656 - Internal error in function module &1

SAP Error Message - Details

• Message type: E = Error

• Message class: MN - Message class for subsequent settlement (Purchasing)

• Message number: 656

• Message text: Internal error in function module &1

What causes this issue?

An internal error occurred. Function module &V1& could not find a
condition record to process.

System Response

Processing is terminated.

How to fix this error?

Contact your system administrator.

Procedure for System Administrators

Contact SAP.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MN656 - Internal error in function module &1 ?

  The SAP error message MN656, which states "Internal error in function module &1," typically indicates that there is an unexpected issue occurring within a specific function module in the SAP system. This error can arise from various underlying causes, including:
  Causes:
  
  Data Inconsistencies: There may be inconsistencies or corruption in the data being processed by the function module.
  Configuration Issues: Incorrect configuration settings in the system can lead to unexpected behavior in function modules.
  Custom Code: If there are custom enhancements or modifications in the function module, they may introduce errors.
  System Bugs: There could be bugs in the SAP system or the specific version you are using.
  Performance Issues: Resource limitations or performance bottlenecks can sometimes lead to internal errors.
  
  Solutions:
  
  Check SAP Notes: Look for relevant SAP Notes in the SAP Support Portal that address the specific function module mentioned in the error message. SAP frequently releases patches and updates to fix known issues.
  Analyze the Dump: Use transaction code ST22 to check for short dumps related to the error. This can provide more context about what went wrong.
  Debugging: If you have access to the development environment, you can debug the function module to identify the exact point of failure.
  Data Validation: Ensure that the data being processed is valid and consistent. Check for any anomalies in the input data.
  Review Custom Code: If there are any custom enhancements related to the function module, review them for potential issues.
  System Performance: Monitor system performance and resource usage to ensure that the system is not under heavy load or facing resource constraints.
  Contact SAP Support: If the issue persists and you cannot find a resolution, consider reaching out to SAP Support for assistance.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like ST22 (Dump Analysis), SM21 (System Log), and SLG1 (Application Log) to gather more information about the error.
  Function Module Documentation: Review the documentation for the specific function module mentioned in the error message to understand its purpose and expected behavior.
  System Version: Ensure that your SAP system is up to date with the latest patches and updates, as many internal errors are resolved in newer versions.
  
  By following these steps, you should be able to diagnose and potentially resolve the MN656 error in your SAP system.