: Windows has a 256-character limit. If your project is buried in too many folders, 3ds Max will fail to write the file.
: Licensing software often fails if your system clock is incorrect. Go to your Windows settings and ensure your Time and Region are synced automatically. Autodesk 3DS MAX 2018 20.0.0.966
: For persistent license "pieces" or missing product keys, you can find troubleshooting guides on the Autodesk Support Page . 3ds Max Free Trial - Autodesk : Windows has a 256-character limit
: Ensure there isn't a space at the end of your filename before saving. Autodesk 3DS MAX 2018 20.0.0.966