[Solved]Error trying execute without QTCreator: Entry Point Not Found

vinicius

I tried to copy all dlls to run my project out of QtCreator and received this message:
The procedure entry point_cxa_throw_bad_array_new_length could not be located in the dynamic link library D:\Documents\build-TP-CALC2-Desktop_Qt_5_4_1_MinGW_32bit-Release\release\Qt5Core.dll

What might be happening?

hskoglund

Hi, this error can occur if you copy the Qt5Core.dll (and the other DLLs) from the wrong place.
I'm guessing you copied from C:\Qt\Tools\QtCreator\bin (which gives you that error). Instead, try copying from the C:\Qt\5.4\mingw491_32\bin directory.

vinicius

I copied from C:\Qt\5.4\mingw491_32\bin.
First I used the windeployqt. I thought it was a bug or something else and decided to copy manually. However, the same error has occurred.

Edit:
If I copy .exe to C:\Qt\5.4\mingw491_32\bin, its execute fine.
If I copy dlls to .exe folder, its crashes.
There are something wrong with my system configuration?

JKSH

Hi @vinicius,

Do you have any Qt-related items in your PATH? If so, remove them. This is a common cause of crashes.

vinicius

No, there are no QT in path.

JKSH

@vinicius said:

If I copy .exe to C:\Qt\5.4\mingw491_32\bin, its execute fine.
If I copy dlls to .exe folder, its crashes.

That means your .exe grabbed the correct DLLs when you copied it into C:\Qt\5.4\mingw491_32\bin, but grabbed the wrong DLLs when you copied the DLLs into the .exe folder.

Follow the steps at http://wiki.qt.io/Deploy_an_Application_on_Windows closely.

If that still doesn't work,

Run your .exe from C:\Qt\5.4\mingw491_32\bin
While it's running, use the ListDLLs tool to see what DLLs it has loaded
- The command would be something like ListDLLs.exe TP-CALC2 > log.txt
Quit your .exe
Run your .exe from the exe folder
When the error message appears, run ListDLLs again.
Compare your DLL list and see what's different.

Chris Kawa

bad_array_new_length is a symbol from the standard library, so I'm guessing you did not copy the compiler runtime libs (libstdc++-6.dll and libgcc_s_dw2-1.dll)?

vinicius

Thank you all.
I did like http://wiki.qt.io/Deploy_an_Application_on_Windows says: Copy all files and delete the unnecessary.
I don't know what I was doing wrong, but now it worked.

Mark Ma

@vinicius Hi, I solved this by using the cmd
"D:\Qt\Qt5.8.0\5.8\mingw53_32\bin\windeployqt.exe test1.exe"
it automatically copy all the dependent dlls to the folder. some of the dlls are not indicated by the error messages. But it just works