How To Fix /SAPAPO/MAT045 - Unit &1 still used for lot size conversion

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/MAT -

• Message number: 045

• Message text: Unit &1 still used for lot size conversion

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/MAT045 - Unit &1 still used for lot size conversion ?

  The SAP error message /SAPAPO/MAT045 Unit &1 still used for lot size conversion typically occurs in the context of SAP Advanced Planning and Optimization (APO) when there is an issue related to the unit of measure (UoM) for a material that is still being used in a lot size conversion process. This can happen when you attempt to delete or change a unit of measure that is currently in use for lot size calculations.
  Cause:
  
  Active Lot Size Conversion: The unit of measure you are trying to delete or modify is still being referenced in the lot size conversion settings for one or more materials.
  Material Master Settings: The material master data may have configurations that are still linked to the unit of measure in question.
  Open Transactions: There may be open transactions or planning runs that are still using the unit of measure.
  
  Solution:
  
  
  Check Lot Size Conversion Settings: 
  
  Navigate to the lot size conversion settings in the material master or APO settings and verify if the unit of measure is still being used.
  If it is, you will need to remove or change the references to this unit of measure before you can delete or modify it.
  
  
  
  Review Material Master Data:
  
  Go to the material master (transaction code MM03) and check the relevant views (like Basic Data, Purchasing, and Sales) to see if the unit of measure is still assigned.
  If it is, consider changing the unit of measure in the material master or removing it from the relevant views.
  
  
  
  Check for Open Transactions:
  
  Ensure that there are no open transactions or planning runs that are using the unit of measure. You may need to wait for these processes to complete or cancel them if they are no longer needed.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for specific instructions on handling unit of measure issues in APO.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM03 (Display Material), MM02 (Change Material), and /SAPAPO/MC90 (for checking lot size settings).
  Unit of Measure Configuration: Understand how units of measure are configured in SAP and how they relate to material planning and lot sizing.
  SAP Notes: Check for any SAP Notes related to this error message for additional guidance or patches that may address the issue.
  
  By following these steps, you should be able to resolve the error message and successfully manage the unit of measure in your SAP APO system.