How To Fix GU012 - The secondary index for this function is not defined (&)

GU012 - Overview

• Message type: E = Error

• Message class: GU - FI-SL utilities

• Message number: 012

• Message text: The secondary index for this function is not defined (&)

What causes this issue?

You tried to display a document, and entered the document number or the
reference document number to do so. You can only access the document if
the appropriate FISL line-item table has a valid secondary key. However,
the system could not find this key.

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?

Check your FI-SL line-item tables.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message GU012 - The secondary index for this function is not defined (&) ?

  The SAP error message GU012 indicates that a secondary index for a specific function is not defined in the system. This typically occurs when the system is trying to access a secondary index that has not been created or is not available for the specified table or function module.
  
  Cause:
  
  Missing Secondary Index: The secondary index that the system is trying to access has not been defined in the database.
  Incorrect Configuration: There may be a configuration issue where the system is expecting a secondary index that is not set up.
  Table Structure Changes: If there have been recent changes to the table structure, the secondary index may need to be recreated or adjusted.
  Transport Issues: If the system has been recently updated or transported, the secondary index may not have been included in the transport.
  
  
  Solution:
  
  
  Check Index Definition:
  
  Go to transaction code SE11 (Data Dictionary).
  Enter the name of the table that is causing the error.
  Check the