How To Fix OM464 - Material Ledger already in production. Deactivation no longer possible

OM464 - Overview

• Message type: E = Error

• Message class: OM - Customizing Materialwirtschaft

• Message number: 464

• Message text: Material Ledger already in production. Deactivation no longer possible

What causes this issue?

You are trying to remove the <LS>Material ledger active</> indicator
for valuation area &V1&, even though the data in this valuation area
has already been converted at production start-up.

System Response

You can no longer deactivate the material ledger for valuation area
&V1&.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

OM464 - Details

• The SAP error message OM464 ("Material Ledger already in production. Deactivation no longer possible") typically occurs when you attempt to deactivate the Material Ledger for a company code or plant that has already been activated and is in use. The Material Ledger is a component in SAP that allows for the management of inventory valuation and provides functionalities for actual costing.
  
  Cause:
  
  Material Ledger Activation: The Material Ledger has been activated for the company code or plant, and transactions have already been posted that utilize the Material Ledger.
  Production Environment: Once the Material Ledger is in production (i.e., transactions have been processed), SAP does not allow deactivation to maintain data integrity and consistency.
  
  
  Solution:
  
  
  Assess the Need for Deactivation: Before attempting to deactivate the Material Ledger, ensure that it is absolutely necessary. If you are looking to change settings or configurations, consider whether adjustments can be made without deactivation.
  
  
  Consult Documentation: Review SAP documentation and guidelines