How To Fix MN403 - Invalid line category & (internal error)

MN403 - Overview

• Message type: E = Error

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

• Message number: 403

• Message text: Invalid line category & (internal error)

What causes this issue?

There is an indicator for each list line. This controls which function
is performed when the line is selected.
However, indicator &V1& is not allowed.

How to fix this error?

Please contact your system administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MN403 - Invalid line category & (internal error) ?

  The SAP error message MN403 "Invalid line category & (internal error)" typically occurs in the context of the Material Management (MM) module, particularly when dealing with invoice verification or material document processing. This error indicates that there is an issue with the line category being used in a transaction, which is not recognized or is invalid.
  Causes:
  
  Incorrect Line Category: The line category specified in the transaction does not exist or is not valid for the operation being performed.
  
  Configuration Issues: There may be a configuration issue in the system where the line categories are not properly defined or have been altered.
  Data Corruption: There could be corruption in the data related to the line categories, leading to the system not recognizing them.
  Custom Development: If there are custom developments or enhancements in the system, they might be causing conflicts with standard line categories.
  
  Solutions:
  
  Check Line Category: Verify the line category being used in the transaction.