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

MN656 - Overview

• 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.

MN656 - Details

• 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: