How To Fix LB166 - Not all units of measurement could be deleted

SAP Error Message - Details

• Message type: E = Error

• Message class: LB - Logistics: Batch - Management

• Message number: 166

• Message text: Not all units of measurement could be deleted

What causes this issue?

You want to delete one or more units of measurement.

System Response

Not all units of measurement could be deleted because they are used in
one or more materials.

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 LB166 - Not all units of measurement could be deleted ?

  The SAP error message LB166, which states "Not all units of measurement could be deleted," typically occurs when there are dependencies or references to the units of measurement (UoM) that you are trying to delete. This can happen in various contexts, such as when dealing with material master data, inventory management, or other related modules.
  Causes:
  
  Existing References: The unit of measurement you are trying to delete is still being used in various transactions or master data records. For example, it may be linked to materials, purchase orders, sales orders, or inventory records.
  Default UoM: If the unit of measurement is set as the default for a material or is used in a conversion factor, it cannot be deleted.
  Customizing Settings: There may be customizing settings that prevent the deletion of certain units of measurement.
  Data Integrity Constraints: SAP enforces data integrity, and if there are constraints that require the UoM to remain in the system, it will not allow deletion.
  
  Solutions:
  
  Check References: Before attempting to delete a unit of measurement, check if it is being used in any material master records, purchase orders, sales orders, or other transactions. You can use transaction codes like MM03 (Display Material) to check for references.
  Change Default UoM: If the UoM is set as the default for any materials, change the default UoM to another valid unit before attempting to delete it.
  Remove Dependencies: Ensure that all dependencies and references to the UoM are removed. This may involve updating or deleting related records.
  Use Transaction Code: You can use transaction code CUNI (Unit of Measure) to manage units of measurement. This transaction allows you to view and manage UoMs in the system.
  Consult Documentation: Review SAP documentation or help files for specific instructions related to the units of measurement and their management.
  Check Customizing Settings: If you have access to customizing settings, check if there are any specific configurations that prevent the deletion of UoMs.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM03 (Display Material), MM02 (Change Material), and CUNI (Unit of Measure).
  SAP Notes: Check SAP Notes for any known issues or additional guidance related to this error message.
  User Authorizations: Ensure that you have the necessary authorizations to delete units of measurement in the system.
  Testing in Development: If possible, test the deletion process in a development or quality assurance environment before making changes in the production environment.
  
  If you continue to face issues after following these steps, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in the relevant module.