Typically a bug in custom ARX/LISP code that improperly interacts with UI handles, or a graphics driver issue with legacy GDI rendering.
Perform a clean reinstall or disable third-party add-ins temporarily. 3.4 Access Violation in acui24.dll Error: Exception code 0xC0000005 with module acui24.dll . acui24.dll autocad 2023
Ensure the AutoCAD installation folder is in the system PATH, or launch from the correct directory. 3.3 Crashes in Legacy Dialogs Symptoms: AutoCAD crashes when opening Layer Manager or Properties palette. Typically a bug in custom ARX/LISP code that
Corrupted acui24.dll or conflict with third-party ARX applications that hook into UI. Ensure the AutoCAD installation folder is in the
For optimal performance, keep AutoCAD updated, avoid manually deleting or moving this file, and always verify its digital signature if you suspect tampering. Last updated: 2025 – Based on AutoCAD 2023 build 24.0.106.0
1. Overview acui24.dll is a critical Dynamic Link Library (DLL) file belonging to Autodesk AutoCAD 2023. The "24" in its name corresponds to the internal version number of AutoCAD 2023 (version 24.0). This file is an integral part of the AutoCAD User Interface (UI) framework, specifically handling legacy and core UI components that are not yet fully migrated to newer frameworks like .NET or modern JavaScript-based ribbons.