How To Fix CKMLMV304 - Posting to a prior period: Actual BOM exists in the previous period

SAP Error Message - Details

• Message type: E = Error

• Message class: CKMLMV - Message class for quantity structure tool

• Message number: 304

• Message text: Posting to a prior period: Actual BOM exists in the previous period

What causes this issue?

You are trying to display the actual BOM for a line that represents a
posting in the previous period.

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?

Display the material ledger daten for the previous period and choose
the actual BOM again.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CKMLMV304 - Posting to a prior period: Actual BOM exists in the previous period ?

  The SAP error message CKMLMV304, which states "Posting to a prior period: Actual BOM exists in the previous period," typically occurs in the context of Material Ledger and Costing when you attempt to post a transaction that affects a previous period where an actual Bill of Materials (BOM) is already defined. This can happen during month-end closing processes or when trying to adjust costs for prior periods.
  Cause:
  
  Actual BOM Exists: The error indicates that there is an actual BOM defined for the previous period, which means that the system has already recorded the costs based on that BOM.
  Period Closing: The period you are trying to post to has already been closed, and the system does not allow changes that would affect the closed period.
  Costing Variants: The costing variant used may not allow postings to prior periods if actual costs have been calculated based on the BOM.
  
  Solution:
  
  Check BOM Validity: Verify if the BOM for the previous period is still valid and if any changes are necessary. If changes are needed, you may need to adjust the BOM for the current period instead.
  Open the Period: If it is necessary to post to the previous period, you may need to open that period again in the system. This should be done with caution and typically requires authorization.
  Adjust Costing: If the actual costs need to be adjusted, consider using the appropriate transaction to adjust costs for the current period instead of the previous one.
  Consult with Finance Team: Work with your finance or controlling team to understand the implications of changing prior period postings and to ensure compliance with accounting standards.
  Use Transaction CKMLCP: If you need to reprocess the actual costing, you can use transaction CKMLCP to reprocess the actual costing for the relevant periods.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message. SAP frequently releases notes that address known issues.
  Documentation: Review the SAP documentation on Material Ledger and actual costing to understand the implications of posting to prior periods.
  User Authorizations: Ensure that you have the necessary authorizations to make changes to closed periods or to adjust BOMs.
  
  Best Practices:
  
  Always perform month-end closing activities carefully and ensure that all necessary adjustments are made before closing the period.
  Maintain clear communication with the finance and controlling teams to avoid issues related to period postings.
  Regularly review BOMs and cost estimates to ensure they are up-to-date and reflect the current production processes.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a consultant who specializes in SAP Material Ledger and costing processes.