How To Fix MM161 - No base unit of measure can be determined for the manufacturer part

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 161

• Message text: No base unit of measure can be determined for the manufacturer part

What causes this issue?

The system has tried to copy the base unit of measure for the
<DS:GLOS.manufacturer_part>manufacturer part</> from your company's own
material. However, no base unit of measure could be determined due to
one of the following reasons:
You have not assigned the manufacturer part to a material of your own.
The material to which the manufacturer part is assigned does not have a
base unit of measure, that is, the material master record is defective.

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?

Depending on the cause, choose one of the following options:
Assign the manufacturer part to a material of your own.
Correct the material master record of the material to which the
manufacturer part is assigned.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MM161 - No base unit of measure can be determined for the manufacturer part ?

  The SAP error message MM161, which states "No base unit of measure can be determined for the manufacturer part," typically occurs in the Materials Management (MM) module when the system is unable to find a valid base unit of measure for a specific manufacturer part number. This can happen during various processes, such as creating or updating material master records, or when trying to perform transactions involving that material.
  Causes:
  
  Missing Base Unit of Measure: The material master record for the specific manufacturer part does not have a defined base unit of measure.
  Incorrect Manufacturer Part Number: The manufacturer part number may not be correctly linked to the material master.
  Data Inconsistencies: There may be inconsistencies or missing data in the material master or related tables.
  Configuration Issues: The configuration settings in the system may not be set up correctly to recognize the base unit of measure for the manufacturer part.
  
  Solutions:
  
  
  Check Material Master Record:
  
  Go to the material master record (transaction code MM03) and verify that the base unit of measure is correctly defined in the Basic Data view.
  If it is missing, you can add it using transaction code MM02 (Change Material).
  
  
  
  Verify Manufacturer Part Number:
  
  Ensure that the manufacturer part number is correctly entered and linked to the material master. You can check this in the relevant views of the material master.
  
  
  
  Review Unit of Measure Settings:
  
  Check the unit of measure settings in the configuration (transaction code SPRO) to ensure that the base unit of measure is defined for the relevant material type and industry sector.
  
  
  
  Check for Data Inconsistencies:
  
  Run consistency checks or reports to identify any data inconsistencies in the material master records.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for any specific notes or guidelines related to the error message MM161.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  MM01: Create Material
  MM02: Change Material
  MM03: Display Material
  MM17: Mass Change of Material
  SPRO: Customizing (Configuration)
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  User Roles and Authorizations: Ensure that the user has the necessary authorizations to view and edit material master records.
  
  
  By following these steps, you should be able to identify and resolve the issue related to the MM161 error message in SAP.