The error indicates that the program is trying to call a function (SetThreadDescription) that does not exist in the version of the DLL (Qt6Core.dll) or Windows being used. This is a DLL entry‑point problem: the application expects a specific exported function in a DLL, but the loader cannot find it.
In general, this happens when:
- The DLL is built for a newer Windows version than the one installed, and it calls APIs that the older OS does not provide.
- The application or its libraries are mismatched (for example, an older EXE with a newer or incompatible Qt6Core.dll, or vice versa).
From the documentation:
- A DLL exposes procedures (functions) as entry points. If the entry point name or ordinal does not match what the caller expects, the loader reports that it cannot find the entry point in the specified DLL.
- In Visual Basic/.NET scenarios, a similar error appears as “Unable to find entry point
<name> in DLL <filename>”, and the fix is to ensure the procedure name and casing match exactly.
Applied to this case, the practical resolutions are:
- Ensure the application and Qt libraries match
- Reinstall or repair the application that uses
Qt6Core.dll so it deploys the correct version of Qt for that program.
- Avoid mixing Qt DLLs from different applications or versions in the same folder.
- Ensure the OS supports the required API
-
SetThreadDescription is a Windows API exported by newer Windows builds. On older Windows versions, this function is not available, so any DLL or program that requires it will fail to load.
- If the OS is an older “previous Windows version”, the only reliable fix is to upgrade Windows to a version that supports the API required by the Qt build in use.
- Avoid incorrect or corrupted DLLs
- If a third‑party installer placed an incompatible
Qt6Core.dll under C:\Program Files\shortcut\, uninstall that program and reinstall a version that officially supports the current Windows version.
Brief explanation:
- A dynamic link library (DLL) contains functions that programs call at run time.
- Each callable function has an “entry point” (its exported name or ordinal).
- When a program starts, Windows checks that every required entry point exists in each DLL. If a required entry point is missing, the loader reports an error like “the procedure entry point … could not be located in the dynamic link library …” and the program cannot start.
In this scenario, the program expects the SetThreadDescription entry point but the combination of Windows version and Qt6Core.dll does not provide it, so the loader fails.
References: