This error is rarely random. It stems from one of several root causes. Identifying your scenario will lead to the right fix.
cd "C:\Program Files\Autodesk\AutoCAD 20xx" autocad fatal error acismobj20.dbx
In plain English: in your drawing or system environment. This error is rarely random
In the pantheon of AutoCAD crashes, this error is a notorious heavyweight. It strikes without warning, often when saving, plotting, or switching between layout tabs. Suddenly, hours of meticulous drafting vanish into the digital abyss. often when saving