How To Fix MM322 - Proportion and product units are not allowed as lower-level units

MM322 - Overview

• Message type: E = Error

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

• Message number: 322

• Message text: Proportion and product units are not allowed as lower-level units

What causes this issue?

The unit of measure &V1& is a <DS:DE.LRMEI_WS>proportion unit</> or
<DS:DE.LRMEI_WS>product unit</>. These units of measure are not allowed
as lower-level units.

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?

Change the lower-level unit.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MM322 - Proportion and product units are not allowed as lower-level units ?

  The SAP error message MM322 indicates that there is an issue with the unit of measure (UoM) configuration in the context of material management, specifically when dealing with proportion and product units. This error typically arises when you are trying to use a lower-level unit of measure that is not compatible with the higher-level unit of measure in a bill of materials (BOM) or in inventory management.
  
  Cause:
  The error occurs due to the following reasons:
  
  Incompatible Units of Measure: The system does not allow the use of proportion units (like percentages) or product units (like units of measure that are derived from other units) as lower-level units in a BOM or inventory structure.
  
  Configuration Issues: The unit of measure settings in the material master or BOM may not be correctly configured, leading to this incompatibility.
  Incorrect BOM Structure: The structure of the BOM may be incorrectly defined, where a lower-level component is defined with