How To Fix KK423 - Lot size changed

SAP Error Message - Details

• Message type: E = Error

• Message class: KK -

• Message number: 423

• Message text: Lot size changed

What causes this issue?

You changed the lot size.

System Response

The quantities were converted and the total value of the cost estimate
was recalculated.

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 KK423 - Lot size changed ?

  The SAP error message KK423 "Lot size changed" typically occurs in the context of controlling and production planning when there is a discrepancy between the lot size defined in the system and the lot size that is being used in a particular transaction or process. This can happen in various scenarios, such as during the creation of production orders, cost planning, or when executing certain transactions related to materials or production.
  Cause:
  
  Lot Size Configuration: The lot size defined in the material master or production order may have been changed, leading to a mismatch with the expected lot size in the transaction.
  Master Data Changes: Changes in the material master data, such as the lot size settings, can trigger this error if the new settings are not compatible with existing orders or transactions.
  Transaction Data: If a user attempts to process a transaction that requires a specific lot size, and the current configuration does not match, this error will be raised.
  
  Solution:
  
  Check Lot Size Settings: Review the lot size settings in the material master (transaction code MM02) and ensure they are correctly configured according to your business requirements.
  Review Production Orders: If the error occurs during the processing of production orders, check the lot size defined in the production order and compare it with the material master settings.
  Adjust Transaction Data: If the transaction data is causing the issue, you may need to adjust the lot size in the transaction to match the defined lot size in the material master.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on handling lot size changes and related error messages.
  User Training: Ensure that users are trained on the importance of maintaining consistent lot sizes and the implications of changing them in the system.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM02 (Change Material), CO01 (Create Production Order), and KKF6N (Change Plan).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  System Configuration: Review the configuration settings in the SAP system related to production planning and controlling to ensure they align with your operational processes.
  Testing: After making changes, conduct thorough testing to ensure that the issue is resolved and that no new issues arise from the changes made.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP support team or a technical consultant for further assistance.