How To Fix MM020 - The unit & is still used as the order unit for supplier &

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 020

• Message text: The unit & is still used as the order unit for supplier &

What causes this issue?

The unit of measure &V1& is still used as the <DS:GLOS.order_unit>order
unit</> in at least one <DS:GLOS.purchasing_info_record>purchasing info
record</> 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 in the purchasing info records concerned.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MM020 - The unit & is still used as the order unit for supplier & ?

  The SAP error message MM020 indicates that a specific unit of measure (UoM) is still being used as the order unit for a supplier, which prevents you from making changes to that unit of measure in the system. This typically occurs when you attempt to delete or change a unit of measure that is actively linked to a vendor or material.
  Cause:
  The error arises when:
  
  You are trying to delete or change a unit of measure that is currently assigned as the order unit for a supplier in the material master or vendor master data.
  The unit of measure is still in use in existing purchase orders, contracts, or other documents.
  
  Solution:
  To resolve the MM020 error, you can follow these steps:
  
  
  Check Usage: 
  
  Verify if the unit of measure is being used in any active purchase orders, contracts, or other documents. You can do this by checking the relevant tables (e.g., EKKO for purchase orders, EKPO for purchase order items).
  
  
  
  Change or Delete Usage:
  
  If the unit of measure is in use, you will need to either:
  
  Change the order unit for the supplier in the material master or vendor master to a different unit of measure that is not being used.
  Delete or close any purchase orders or contracts that are using that unit of measure.
  
  
  
  
  
  Update Material Master:
  
  Once you have ensured that the unit of measure is no longer in use, you can proceed to update the material master or vendor master data to remove or change the unit of measure.
  
  
  
  Check for Dependencies:
  
  Ensure that there are no other dependencies or settings that might be preventing the change. This includes checking for any related configuration settings in the SAP system.
  
  
  
  Consult Documentation:
  
  If you are unsure about the implications of changing the order unit, consult your organization's SAP documentation or reach out to your SAP support team for guidance.
  
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like MM02 (Change Material) or MK02 (Change Vendor) to make the necessary changes.
  Tables: Familiarize yourself with relevant tables such as:
  
  MARA (General Material Data)
  MAST (Material to BOM Link)
  EKKO (Purchasing Document Header)
  EKPO (Purchasing Document Item)
  
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message.
  
  By following these steps, you should be able to resolve the MM020 error and successfully manage the unit of measure in your SAP system.