Procedure entry point could not be found in dll, again!!

pfnus

Hi
I googled and found a lot of posts regarding issue when i tried to run my qt app from command line, error dialog pops up similar to this, saying "The Procedure entry point ?argToString@QtPrivate@@YA?AVQString@@....." could not be located in the dynamic link library C:\Qt\5.15.2\msvc2019_64\bin\Qt5Qmld.dll"

All answer pointing to things like many dlls exists, linked to wrong dll etc etc, but none seemed to be link to the problem i faced.. i wonder what went wrong with my system;

Why i said so is because;
There is only one dll throughout my system, i.e C:\Qt\5.15.2\msvc2019_64\bin\Qt5Qmld.dll.

C:\Qt\5.15.2\msvc2019_64\bin is in the top of my system env path.

I can build and run from the QtCreator IDE, no problem! When i go to debug mode, i saw the same dll C:\Qt\5.15.2\msvc2019_64\bin\Qt5Qmld.dll was being loaded!

However when i tried to run the same exe from cmd prompt, even though from Qt cmd prompt, i got the error as above. What actually went wrong??? If i copied the dll into the exe directory, c:\dev\build, and run from cmd prompt again, now the error will change saying the same procedure entry point could not be found in c:\dev\build\QtQmld.dll ! This is very puzzling, QtCreator can load the same dll and the procedure found, but not when i run from cmd line??

jsulm

@pfnus If you want to run your app outside of QtCreator (which prepares the environment before starting your app) you need to deploy your app. You can use https://doc.qt.io/qt-5/windows-deployment.html for that.

Pl45m4

@pfnus

Are you sure you took the right DLLs? Do you use MinGW?

https://forum.qt.io/topic/37567/solved-the-procedure-entry-point-_z4endlr11qtextstream-could-not-be-located-in-the-dynamic-link-library-qtcore-dll

Edit:

Is this error happening while you deploy your app or do you try to run it from outside your IDE?

pfnus

Hi i am using msvc2019 compiler in QT creator IDE, with cmake in CMakeList. I can build, run and debug in the IDE.

When i run outside IDE, i am launching the visual studio cmd prompt, then build.the same application using the same cmake file i used in IDE, except this time i invoke cmake from cmd.prompt. Again i can build the same source successfully. But when i try to execute the app, a window pops up complaining procedure not found in the dll mentioned above.

I need to mention that i can do both before, and what i encountered here is not due to dll not found, so is not related to deployment of QT.