How To Fix MM028 - The order unit for material & may not be deleted

SAP Error Message - Details

• Message type: E = Error

• Message class: MM - Messages for material master maintenance and Customizing

• Message number: 028

• Message text: The order unit for material & may not be deleted

What causes this issue?

The unit of measure is used as the <DS:GLOS.order_unit>order unit</>
and may not therefore be deleted.

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?

If you want to delete the unit of measure nevertheless, change the
order unit to another unit.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MM028 - The order unit for material & may not be deleted ?

  The SAP error message MM028 ("The order unit for material & may not be deleted") typically occurs in the Materials Management (MM) module when there is an attempt to delete the order unit for a material that is still being used in the system. This can happen in various scenarios, such as when trying to delete or change the material master data.
  Cause:
  
  Active Transactions: The material is currently being used in open purchase orders, production orders, or other transactions.
  Dependencies: The order unit is linked to other data or processes that prevent its deletion.
  Configuration Settings: Certain configuration settings in the system may restrict the deletion of order units.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Active Transactions:
  
  Use transaction codes like ME23N (Display Purchase Order) or CO03 (Display Production Order) to check if there are any active transactions involving the material.
  If there are open purchase orders or production orders, you will need to either complete or delete those transactions before you can delete the order unit.
  
  
  
  Review Material Master Data:
  
  Go to transaction MM03 (Display Material) and check the material master data for any dependencies or settings that might be preventing the deletion.
  Ensure that the order unit is not being used in any other configuration or master data.
  
  
  
  Change the Order Unit:
  
  If you cannot delete the order unit, consider changing it instead. You can do this in transaction MM02 (Change Material) by updating the order unit to a different value that is valid.
  
  
  
  Consult with Your SAP Administrator:
  
  If you are unable to resolve the issue, consult with your SAP administrator or support team. They may have access to additional tools or logs that can help identify the root cause.
  
  
  
  Check for Customizations:
  
  If your organization has custom developments or enhancements, check if any of these are affecting the ability to delete the order unit.
  
  
  
  Related Information:
  
  Transaction Codes: 
  
  MM03: Display Material
  MM02: Change Material
  ME23N: Display Purchase Order
  CO03: Display Production Order
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review SAP documentation for the Materials Management module for more details on material master data management.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it.