What is the purpose of the confirming material number function in the host computer CMC?

What is the KM-ASSYM1-05 error id of 121?

How can the function of confirming the material number of the host computer CMC be blocked machine code?
To resolve M7120 error, ensure that the host computer CMC is functioning properly and has the necessary permissions to access the material number confirmation function. You may also need to update the system or application software to the latest version. If the