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

LB166 - Overview

• 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.

LB166 - Details

• 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