(Sysinternals) to trace load failures.
The pattern is clear: acui<internal_version>.dll . This allows side-by-side installation of multiple AutoCAD versions without DLL conflicts.
Repair AutoCAD via Control Panel > Programs > Autodesk AutoCAD 2023 > Uninstall/Change > Repair or reinstall.
acui24.dll is a legacy but essential component of AutoCAD 2023's user interface system. While modern UI features rely on newer libraries, this DLL ensures backward compatibility and operation of classic dialogs and menus. Most end users will never interact with it directly, but developers, IT administrators, and power users should recognize its role when diagnosing UI-related crashes or startup errors.
– If crashes occur in UI rendering, toggle GRAPHICSCONFIG > Hardware Acceleration > Off.
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