AutoCAD LT 2015 on Windows 11 – FATAL ERROR: acismobj20.dbx

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If you are running AutoCAD LT 2015 on Windows 11 and you receive this error…

FATAL ERROR: (0x7ffb71c40005) C:\Program Files\Autodesk\AutoCAD LT 2015\acismobj20.dbx

The issue is that you are running 64bit AutoCAD LT 2015 on Windows 11, you need to install the 32bit version of AutoCAD LT 2015 instead – to solve the problem, simply follow these instructions.

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