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

SAP Error Message - Details

• 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 a unit of measure that is not allowed.
  
  Solution:
  To resolve the MM322 error, you can take the following steps:
  
  
  Check Unit of Measure Configuration:
  
  Go to the material master (transaction code MM03) and check the UoM settings for the material in question.
  Ensure that the lower-level units of measure are standard units (like pieces, kilograms, liters, etc.) and not proportion or product units.
  
  
  
  Review BOM Structure:
  
  Use transaction code CS03 to display the BOM and check the components listed.
  Ensure that all components have compatible units of measure. If any component is using a proportion or product unit, consider changing it to a standard unit.
  
  
  
  Adjust BOM Components:
  
  If you find any components with incompatible units, you may need to adjust the BOM by changing the unit of measure for those components to a compatible one.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for specific guidelines on unit of measure configurations and BOM structures.
  
  
  
  Testing:
  
  After making the necessary changes, test the BOM or inventory transaction again to ensure that the error is resolved.
  
  
  
  Related Information:
  
  Unit of Measure (UoM): In SAP, UoM is a critical aspect of material management, and it defines how quantities of materials are measured and managed.
  Bill of Materials (BOM): A BOM is a comprehensive list of materials, components, and assemblies required to manufacture a product.
  Material Master: The material master is a central repository of information about materials in SAP, including their characteristics, units of measure, and other relevant data.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or refer to SAP Notes for any specific patches or updates related to this error.