Sometimes the error is transient. Close AutoCAD 2023, log out of your Windows user account, and log back in. Then, right-click the AutoCAD shortcut and select Run as administrator. This re-establishes user permissions and resets temporary file paths.
| ❌ Never do this | ✅ Do this instead | |---------------------|------------------------| | Download DLL from third-party sites | Use official Autodesk installer | | Manually copy from another PC | Run built-in repair/reinstall | | Replace with "cracked" version | Contact Autodesk support | | Delete or modify the file | Verify file signature (should be Autodesk-signed) | autocad 2023 acui24.dll
The most frequent culprit is a simple bad install. If the installer encountered a hiccup—perhaps due to an antivirus interference or a bad internet connection—this file may not have been written to the disk correctly or is incomplete. Sometimes the error is transient