How To Fix MM126 - The maintenance of manufacturer parts has not been activated

MM126 - Overview

• Message type: E = Error

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

• Message number: 126

• Message text: The maintenance of manufacturer parts has not been activated

What causes this issue?

You wanted to maintain <DS:GLOS.manufacturer_part>manufacturer
parts</>. However, the corresponding indicator allowing this has not
been set in Customizing.

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?

Ask your system administrator to set the <LS>Manufacturer part
number</> indicator in Customizing for the <LS>Material Master</> in
the IMG activity <LS>Make global settings</>.
<DS:TRAN.OMT0>Proceed</>

Error message extract from SAP system. Copyright SAP SE.

MM126 - Details

• The SAP error message MM126, which states "The maintenance of manufacturer parts has not been activated," typically occurs in the Materials Management (MM) module when you attempt to perform actions related to manufacturer parts without having the necessary configuration enabled.
  
  Cause:
  The error is caused by the fact that the system settings for managing manufacturer parts (also known as vendor parts or manufacturer data) have not been activated in the SAP system. This can happen if the relevant configuration settings in the system have not been set up or if the necessary authorizations are not in place.
  
  Solution:
  To resolve the MM126 error, you need to activate the maintenance of manufacturer parts in the SAP system. Here are the steps to do this:
  
  
  Access the Customizing Settings:
  
  Go to the SAP Easy Access screen and enter the transaction code SPRO to access the SAP Reference IMG (Implementation Guide).
  
  
  
  Navigate to the Relevant Configuration:
  
  Follow the path: Materials Management