[Solved] "the procedure entry point _Z4endlR11QTextStream could not be located in the dynamic link library QTCore.dll"?

[brandan]

Im trying to deploy my application but when I run it the executable I get the error message of "the procedure entry point _Z4endlR11QTextStream could not be located in the dynamic link library QTCore.dll". I copied all the .dll files from C:\Qt\5.2.1\msvc2010\bin\ into C:\Deployment\ and all the folders from C:\Qt\5.2.1\msvc2010\plugins\ into C:\Deployment\ like the guide said. Any input on what im doing wrong would be greatly appreciated.

[koahnig]

Which compiler did you use to compile your application?
Does it run when started in Qt creator?
Or did you use msvc2010 to compile and run application?

[JKSH]

Hi,

That message usually means you've copied the wrong version of a DLL.

• What compiler did you use to build your application?
• What versions of Qt do you have installed in your PC?
• Can you double-check that you took the DLLs from C:\Qt\5.2.1\msvc2010\bin, and not from Qt Creator's folder?

[brandan]

[quote author="koahnig" date="1391957150"]Which compiler did you use to compile your application?
Does it run when started in Qt creator?
Or did you use msvc2010 to compile and run application? [/quote]

I didn't use a compiler I used the executable from release in a file along with all the folders from msvc2010 bin and all the dll's from msvc2010 plugins. When I run it in QT creator it works fine. Im not sure what msvc2010 is.

[brandan]

[quote author="JKSH" date="1391957250"]Hi,

That message usually means you've copied the wrong version of a DLL.

• What compiler did you use to build your application?
• What versions of Qt do you have installed in your PC?
• Can you double-check that you took the DLLs from C:\Qt\5.2.1\msvc2010\bin, and not from Qt Creator's folder?[/quote]

I dont think I used a compiler I just used the executable from release in a file along with all the folders from msvc2010 bin and all the dll’s from msvc2010 plugins. It works when I compile it in QT Creator though. I have version QT Creator 3.0.0 I think, that's what comes up in "About Qt Creator." Yeah I took the DLLs from that location except Qt\5.2.0 not 5.2.1

[JKSH]

[quote]I dont think I used a compiler I just used the executable from release in a file [/quote]
The compiler is the tool that you used to convert your source code into the .exe file. Qt Creator simply runs the compiler that you already have.

[quote]Im not sure what msvc2010 is.[/quote]

• MSVC is the Microsoft Visual C++ compiler. It is part of Visual Studio (VS) or the Windows SDK.
• MinGW is the Minimalist GNU for Windows toolchain, which contains the GCC (GNU Compiler Collection) compiler.

When you choose a package from http://qt-project.org/downloads , you must pick the package that matches the your compiler. A MSVC DLL cannot be used with an .exe file that was produced with MinGW, and vice-versa. In fact, an MSVC 2010 DLL cannot be used with an .exe file that was produced with MSVC 2012.

Did you install Visual Studio?

[quote]I have version QT Creator 3.0.0 I think,[/quote]Qt is the library. Qt Creator is an IDE.

Your version of Qt Creator won't affect your program, but your version of Qt is important. Which Qt package(s) did you download?

• Was it something like "Qt 5.2.1 for Windows 32-bit (MinGW 4.8, OpenGL, 634 MB)"?
• Or "Qt 5.2.1 for Windows 32-bit (VS 2010, 518 MB)"?
• Or something completely different?

[brandan]

[quote author="JKSH" date="1391958471"][quote]I dont think I used a compiler I just used the executable from release in a file [/quote]
The compiler is the tool that you used to convert your source code into the .exe file. Qt Creator simply runs the compiler that you already have.

[quote]Im not sure what msvc2010 is.[/quote]

• MSVC is the Microsoft Visual C++ compiler. It is part of Visual Studio (VS) or the Windows SDK.
• MinGW is the Minimalist GNU for Windows toolchain, which contains the GCC (GNU Compiler Collection) compiler.

When you choose a package from http://qt-project.org/downloads , you must pick the package that matches the your compiler. A MSVC DLL cannot be used with an .exe file that was produced with MinGW, and vice-versa. In fact, an MSVC 2010 DLL cannot be used with an .exe file that was produced with MSVC 2012.

Did you install Visual Studio?

[quote]I have version QT Creator 3.0.0 I think,[/quote]Qt is the library. Qt Creator is an IDE.

Your version of Qt Creator won't affect your program, but your version of Qt is important. Which Qt package(s) did you download?

• Was it something like "Qt 5.2.1 for Windows 32-bit (MinGW 4.8, OpenGL, 634 MB)"?
• Or "Qt 5.2.1 for Windows 32-bit (VS 2010, 518 MB)"?
• Or something completely different?[/quote]

Alright im using the MinGW 4.8 32bit MinGW Compiler.
I didn't install Visual Studio.
And according to qDebug() << QT_VERSION_STR; I am using version 5.2.0

[JKSH]

[quote author="brandan" date="1391960743"]Alright im using the MinGW 4.8 32bit MinGW Compiler.
I didn't install Visual Studio.[/quote]Then you need to make sure that all your DLLs (e.g. Qt5Core.dll) are from the MinGW package, not the MSVC package.

I presume you can find them somewhere like C:\Qt\5.2.0\mingw48_32\bin

[brandan]

[quote author="JKSH" date="1391961950"][quote author="brandan" date="1391960743"]Alright im using the MinGW 4.8 32bit MinGW Compiler.
I didn't install Visual Studio.[/quote]Then you need to make sure that all your DLLs (e.g. Qt5Core.dll) are from the MinGW package, not the MSVC package.

I presume you can find them somewhere like C:\Qt\5.2.0\mingw48_32\bin[/quote]

Thank you so much that worked!

[JKSH]

You're welcome. :) Happy coding!

P.S. It's worth uninstalling the MSVC package to prevent mixups like this in the future