How To Fix M3342 - Unit of measure & is still used (deletion not possible)

SAP Error Message - Details

• Message type: E = Error

• Message class: M3 - Material Master

• Message number: 342

• Message text: Unit of measure & is still used (deletion not possible)

What causes this issue?

You have attempted to delete the unit of measure &V1& although it is
still used as an alternative unit for the material.

How to fix this error?

Make sure that you really no longer need this unit. If so, first
reset the alternative unit of measure on the corresponding data screen
and then delete the unit of measure on the units of measure screen.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M3342 - Unit of measure & is still used (deletion not possible) ?

  The SAP error message M3342, which states "Unit of measure & is still used (deletion not possible)," typically occurs when you attempt to delete a unit of measure (UoM) that is still being referenced in various transactions or master data within the SAP system. This can happen in several contexts, such as materials management, inventory management, or sales and distribution.
  Cause:
  The error arises because the unit of measure you are trying to delete is still in use in one or more of the following areas:
  
  Material master records
  Purchase orders
  Sales orders
  Inventory records
  Production orders
  Other transactional data
  
  Solution:
  To resolve this error, you need to identify where the unit of measure is still being used and take appropriate action. Here are the steps you can follow:
  
  
  Identify Usage:
  
  Use transaction codes like MM03 (Display Material) to check if the UoM is assigned to any material.
  Check for any open purchase orders, sales orders, or production orders that might be using the UoM.
  You can also use transaction SE16N to query the relevant tables (like MARA, MARC, EKKO, EKPO, VBAK, VBAP, etc.) to find references to the UoM.
  
  
  
  Remove References:
  
  If you find that the UoM is being used in any of the above contexts, you will need to either change or delete those references. This may involve:
  
  Changing the UoM in the material master.
  Closing or deleting open purchase or sales orders.
  Adjusting any inventory records that reference the UoM.
  
  
  
  
  
  Check Customizing Settings:
  
  If the UoM is part of a customizing setting (like a unit of measure conversion), ensure that it is not being used in any configuration.
  
  
  
  Delete the UoM:
  
  Once all references to the UoM have been removed, you can proceed to delete the UoM using transaction CUNI (Unit of Measure) or through the relevant customizing path.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  MM03: Display Material
  MM02: Change Material
  CUNI: Maintain Units of Measure
  SE16N: Data Browser for table queries
  
  
  
  Tables:
  
  MARA: General Material Data
  MARC: Plant Data for Material
  EKKO: Purchasing Document Header
  EKPO: Purchasing Document Item
  VBAK: Sales Document: Header Data
  VBAP: Sales Document: Item Data
  
  
  
  Best Practices:
  
  Before deleting a UoM, always ensure that it is not in use to avoid disruptions in business processes.
  Consider archiving or deactivating the UoM instead of deleting it if it has historical significance.
  
  
  
  By following these steps, you should be able to resolve the M3342 error and successfully delete the unit of measure in question.