Since Autodesk no longer supports Mechanical Desktop, here are :
Open AutoCAD Mechanical and type OPTIONS in the command line. Go to the tab → Mechanical Structure Settings → Mechanical Structure Database File . The path shown is where your Mechset.ini should live. Mechset.ini File Download Free
Users often share original configuration files for free. Since Autodesk no longer supports Mechanical Desktop, here
If the file is truly gone and the game won't auto-generate it: Users often share original configuration files for free
Save this as mechset.ini – but note that full versions contain hundreds of lines for parts libraries.
Users typically search for a for one of three reasons:
If you are playing a game like MechWarrior Online or a classic title through Steam or GOG Galaxy, you should not need to manually download the file from a third-party website.