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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message OM464 - Material Ledger already in production. Deactivation no longer possible ?

  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 regarding the Material Ledger to understand the implications of deactivation and the processes involved.
  
  
  Use Alternative Approaches: If you need to change how the Material Ledger is used, consider:
  
  Adjusting settings within the Material Ledger rather than deactivating it.
  Implementing new processes or configurations that align with your business needs without needing to deactivate the Material Ledger.
  
  
  
  Seek SAP Support: If you believe that deactivation is necessary and you are facing this error, consider reaching out to SAP support or your SAP consultant for guidance. They may provide insights or alternative solutions based on your specific situation.
  
  
  Data Migration: If you are transitioning to a new system or process, consider data migration strategies that allow you to work with the existing Material Ledger data without needing to deactivate it.
  
  
  Related Information:
  
  Material Ledger Configuration: Familiarize yourself with the configuration settings for the Material Ledger in SAP, including how to manage and utilize it effectively.
  Transaction Codes: Use transaction codes like OMAC (for Material Ledger settings) and CKM3N (for material price analysis) to review and analyze your Material Ledger settings and data.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues or provide additional guidance related to the Material Ledger.
  
  In summary, the error OM464 indicates that the Material Ledger cannot be deactivated due to its active status in production. The best approach is to evaluate the necessity of deactivation and explore alternative solutions or configurations that meet your business requirements.