How To Fix OM444 - Mat. ledger type cannot be changed as valuation area &1 is live

SAP Error Message - Details

• Message type: E = Error

• Message class: OM - Customizing Materialwirtschaft

• Message number: 444

• Message text: Mat. ledger type cannot be changed as valuation area &1 is live

What causes this issue?

You are trying to change the assignment or characteristic of the
<DS:GLOS.3526B6D7AFAB52B9E10000009B38F974>material ledger category</>
although the material ledger is already productive in valuation area
&V1&.

System Response

The system will not allow the change because it could lead to
inconsistencies in valuation.
The system remakes the original setting.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OM444 - Mat. ledger type cannot be changed as valuation area &1 is live ?

  The SAP error message OM444 indicates that you are trying to change the material ledger type for a valuation area that is currently "live." This typically means that the valuation area (which can be a plant or company code) is actively using the material ledger for inventory valuation, and therefore, certain changes cannot be made without first addressing the live status.
  Cause:
  
  Live Status: The valuation area is set to "live," meaning that it is actively using the material ledger for transactions. Changes to the material ledger type are restricted in this state to maintain data integrity.
  Configuration Settings: The system configuration may not allow changes to the material ledger type once it is in use.
  
  Solution:
  To resolve this error, you can consider the following steps:
  
  
  Check Live Status: Verify if the valuation area is indeed live. You can do this by checking the configuration settings in the SAP system.
  
  
  Deactivate Live Status: If you need to change the material ledger type, you may need to deactivate the live status of the valuation area. This can typically be done in the configuration settings, but be cautious as this may affect existing transactions and data.
  
  
  Consult Documentation: Review the SAP documentation or help files related to the material ledger and valuation area settings to understand the implications of changing the material ledger type.
  
  
  Backup Data: Before making any changes, ensure that you have a backup of your data. This is crucial in case you need to revert any changes.
  
  
  Contact SAP Support: If you are unsure about the implications of changing the material ledger type or how to proceed, it may be best to consult with SAP support or a qualified SAP consultant.
  
  
  Related Information:
  
  Material Ledger: The material ledger is a tool in SAP that allows for the management of inventory valuation and provides functionalities for actual costing.
  Valuation Area: This is typically a plant or company code in SAP where inventory is managed and valued.
  Configuration Path: You can find the settings for the material ledger in the SAP IMG (Implementation Guide) under:
  
  Logistics > Materials Management > Material Valuation > Material Ledger > Activate Material Ledger.
  
  
  
  Important Note:
  Changing the material ledger type can have significant implications for your financial reporting and inventory management. Always ensure that you fully understand the consequences of such changes and involve relevant stakeholders in the decision-making process.