I'm deploying my QT project to a windows machine and everything worked fine.
Yesterday I add Qwt library to my project and when I deploy it the executable won't start giving this error (On QtCreator everything works fine)
The procedure entry point ?staticMetaObject#QGraphicsEffect##2UQMetaObject##B could not be located in the dynamic link library Qt5Widgets.dll
I think I included all the needed library.
I've tried to use windeployqt,
I've included
DEFINES += QWT_DLL
on the top of my .pro file as read here
but it still give me that error.
Maybe I miss some dependent dll.
Do you have any idea on how to resolve this?
I had the same issue.
I couldn't understand it with dependency walker, as even working apps showed missing dlls.
I used qwt in my program and compiled it in Qt 5.5 with MSVC2013 32bit on a 64bit Windows 10.
After changing 'Qt' folder name to 'QtHidden', as sugested here, I attempted to get the application to run with all the dlls in the same folder and was getting an weird error about qwt like you, althouth I had added qwt.dll.
To get it working I did the following:
Copied all dlls in QtHidden/5.5/mingw492_32/bin to my deploying folder
I copied all folders in QtHidden/5.5/mingw492_32/plugins
Copied all folders in QtHidden/5.5/mingw492_32/qml
// Pretty standard untill now
added qwt.dll
// Now for the trick
Performed the steps 1,2,3 but for the folder QtHidden/5.5/msvc2013, overwriting all dlls and folders previously added from /mingw492_32.
So, what I believe is happening is that some dlls from mingw are needed, like libgcc_s_dw2-1.dll and libstdc++-6.dll, but all other dlls need to come from the MSVC2013 folder for qwt to work, wich was the compiler used.
I managed to run it in Windows Xp 32bit after adding MSVCP120.dll and MSVCR120.dll. Still needed this extra ones because MSVC2013 wasn't installed in the Windows Xp computer.
Compiled in Windows 10 with all resources and ran on Windows Xp. I'd call it a success.
Hope it helps someone else.
Related
I downloaded C++ code from GitHub to tag images for training an object detector using Machine Learning.
Within Qt Creator 4.2.1 Based on Qt 5.8.0 (MSVC 2015, 32bit), I was able to compile and run the code. Unfortunately, I was not able to run the .exe outside of Qt Creator.
Initially, I received an error that
"The program can't start because libgcc_s_dw2-1.dll is missing".
Thanks to
QT The program can't start because libgcc_s_dw2-1.dll is missing, that was fixed easily by adding
"QMAKE_LFLAGS += -static"
to the .pro file. Now, when I run it I get
"The application was unable to start correctly (0xc000007b). Click OK to close the application."
I was able to reproduce the error using the simple "Hello World" default project that appears when you create a Qt Widget Application. This led me to believe something was wrong with my installation.
Based on the advice of this article: https://stackoverflow.com/questions/12099117/32-bit-qt-application-on-win-7-x64-wont-run-but-runs-fine-from-qt-creator, I used Dependency Walker to identify possible causes. I expected to see only a few items that I can follow up on. Instead, I received a list of close to 100 missing .dll files. All the files started with
"API-MS-WIN ###.DLL" or "EXT-MS ###.DLL"
where ### represent some additional text characters, for example;
"API-MS-WIN-SHCORE-STREAM-WINRT-L1-1-0.DLL"
I'm attaching a sample output.
Another suggestion was to copy over
libwinpthread-1.dll, libstdc++-6.dll, libgcc_s_dw2-1.dll.
That did not work either.
My next move was to simply get the latest version of QT and wish for the best. I installed Qt Creator 4.8.1 Based on At 5.12.0 (MSVC 2015, 32 bit). This time, I could not even get the code to run in the IDE. I received 1000+ error messages!
Based on advice from several pages, I added
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
to the .pro file and it still would not compile.
Also, I verified that the application is being built as a 32bit application. I'm running on a 64 bit Windows 10 system.
If anyone would like to take a crack at it to see if they can create a working .exe, here is the link: github.com/clavicule/BBTag
Qt provides a tool to copy the necessary dlls to the folder of your executable.
The tools is called windeployqt.exe and comes with your Qt installation. For me it is located at C:\Qt\5.9.1\msvc2015_64\bin\windeployqt.exe. You will have to look at your installation path and probably the msvc_32 folder to find it.
Then you go to the folder with your executable in it, oben a command prompt or powershell and execute path\to\windeployqt.exe yourProgram.exe and it will automatically copy the necessary dll files to this folder. Afterwards you can run your program without issues.
The official documentation for the tool can be found here.
Alternative 1: While developing you could use QtCreator which automatically adds the paths to the dlls when running your program - make sure to include them if you deploy your program!
Alternative 2: Add the path to the necessary dlls to your PATH variable. This isn't recommended either, since everyone who gets your program would have to do the same to run it.
I figured it out! My installation of Anaconda (a Python distribution popular for data science and machine learning) is the culprit.
From: #remy-lebeau
The application was unable to start correctly (0xc000007b)
The error:
"The application was unable to start correctly (0xc000007b) ..."
is a good indicator that the 32-bit app tried to load a 64-bit DLL. At first, this did not make sense since I verified many times that I was using the 32 bit version of Qt.
It turns out that the installation of the 64 bit version of Anaconda also contained many Qt5 dlls used for the PyQt5 package. Since the path to this folder came before the path to my c:\Qt...\bin folder, it was used in the build instead of the actual 32 bit version installed with Qt. This was not obvious because I was unaware of PyQt5 so I had no idea that it came with Anaconda. A simple reordering of the path entries using the System Environment Variables interface AND a system restart fixed the problem.
Silver lining: I now know C++ and designing GUIs w/ QT and PyQt5
Thanks #albertmand and #jwernerny
I'm new to Qt, but have been working with Visual studio for C/C++ development for a few years. Now I'm trying to build a GUI for my project. I installed Qt 5.11.0 and the Qt VS Tools on both my work computer and home PC. At work I can build and run my project with the VS debugger, however on my home system I can build but can't run either with VS debugger or simply launching the app. I tried in release and it runs fine.
The error I'm getting is :
The code execution cannot proceed because VCRUNTIME140D_APP.dll was not found.
I get 4 of these, the first two want VCRUNTIME, the second two want MSVCP140D_APP.dll.
Solutions I've tried so far :
Uninstalled Win SDK and reinstalled
Uninstalled VS2017 and SDK and reinstalled
Searched System32, SysWOW64 and VS install directories - found msvcp140d.dll and vcruntime140d.dll, but no _app.dlls
Does anyone know what these are included with and where to get them? I can't figure out why I have them on my work computer but not at home. I have the same VS updates, same Qt version, and SDK on both systems.
Using :
Visual Studio 2017 v15.7.1
Qt 5.11.0 - msvc2017_64
I suppose I can just copy the .dll's from my work pc and drop them in the appropriate locations on the other, but I'd like to know what they should have been installed with so I can have the same setup on both systems.
Edit:
I also tried changing the platform toolset to VS2015 with Qt versions msvc2015_64 and winrt_x64_msvc2015
I found this post concerning the same missing _app.dll files. There wasn't any answer there, which is why I tried reinstalling the SDK in the hope the missing files were included there.
Edit 2:
I just scanned my entire system at work and it turns out that I don't have the missing .dll there either. That tells me that there is a difference in the project properties or configuration between the two. I use git for source control, and I am currently the only contributor to this project. When I try to build and run just the example from the getting started guide I have the same problem at home with missing _app.dll files, however it works fine at work. I'm totally confused now, and any hints are greatly appreciated.
Solution:
After trying for a couple of hours making new solutions etc. I decided to delete the entire build folder and put fresh copies of all the dependencies into it. My project now runs fine in debugging mode.
I'm fairly certain that when I originally copied the Qt .dll files into it I must have grabbed them from one of the winrt folders rather than the msvc2017_64 folder. To test I replaced the working .dll files with those from the winrt_x64_msvc2017 folder and sure enough the same errors again. So, this was a dumb mistake on my part, but hopefully it'll save someone else a lot of hair-pulling in the future.
I tried making an executable file of my program but there are some errors which I did not understand or could not find solutions of. I used my .exe file onto another computer and there was an error. I made my program through QtCreator (v 5.1.1)with my Windows 7, 64-bit laptop. There was an error when I used it in 2 32-bit laptops.
The error message says:
This application failed to start because it could not find or load the Qt platform plugin "windows".
Available platform plugins are: minimal, offscreen, windows.
Reinstalling the application may fix the problem.
I already created a new folder called "platforms" containing "qminimal.dll", "qoffscreen.dll" and "qwindows.dll" in the same level of my .exe file. I also pasted in the same level the other DLLs that my program needs.
In Qt 5.2, there is a tool that can be used for deployment on Windows: windeployqt. It will be in the bin folder of your Qt installation. It greatly simplifies deployment, so if you don't mind downloading a newer Qt version, I'd highly recommend it. It may even work with an older Qt version, but I haven't tested it.
We had exact same problem with Qt5.3.
Problem arised when we've rebuilt the Qt to reduce dependencies (e.g. Qt5Positioning, Qt5Sensors).
Created dlls were copied to different directory (source for installation), but we forgot to copy also newly created platforms plugin dlls.
The problem was fixed by using all dlls from same Qt build (with same configuration).
Your problem is probably the same: mixing dlls from different Qt builds (e.g. different configuration, version,...).
I am well aware of the fact that a multitude of similar problems already appeared on this board, however none of the solutions helped me.
I am trying to get Eclipse CDT running with MinGW toolchain on Windows 7 Service Pack 1. I already did that on Windows XP and thought that the same procedure will make it run smoothly on Windows 7, but it seems I was mistaken ;)
After installing MinGW from the automatic installer (just in case I installed a few things more than what I needed) and adding the C:/MinGW/bin to my PATH environment variable, I tried to compile a simple Hello, World! program. Eclipse did not give me any errors, but it didn't want to give any output in the Console window. Alarmed, I tried to run the executable file outside of Eclipse and got the error that
"Program can't start because libstdc++-6.dll is missing".
Strangely enough, this dll is in the C:/minGW/bin directory, so the PATH variable should 'find' it - but it does not. Copying the dll to the directory with the executable file helped, but it is obviously a short-term solution and I would prefer to have a more "normal" one.
The thing that makes my problem different, I think, from the others I've noticed on this board is the fact that, for one, Eclipse does not find any errors with my PATH variable (which it usually does, if the MinGW was not included in the Path variable or something), and besides the required dlls are where they should be, but it seems my Windows can't find them.
The "real" solution is indeed to copy the DLL locally. You have to ship that dll when shipping your EXE.
I'm trying to build the Windows version of my app. The program compiles and runs fine on Qt Creator but when I try to run it standalone it throws the following error:
The procedure entry point _Z17qt_message_output9QtMsgTypePKc could not be located in the dynamic link library QtCore4.dll
I have all the necessary dlls in my application folder and they are the same ones that came with the binaries I've downloaded from the Qt's website. This error is driving me crazy for I can't seem to find any reason for it. The application runs fine on Linux and MAC OS X.
Ok I found the problem. I was copying the wrosng dll (not sure why Qt ships with 2 different versions).
The right ones are in:C:\Qt\2010.05\qt\bin and NOT in C:\Qt\2010.05\bin
I hope this helps anyone who might stumble upon this issue.