Nov 30, 2017 - This application failed to start because it could not find or load the Qt platform plugin windows in WebKit HTML converter. Cannot instantiate a QApplication. Import sys from PyQt5 import QtWidgets app = QtWidgets.QApplication(sys.argv) Results in: This application failed to start because it could not find or load the Qt platfo rm plugin 'windows'.

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This documentation describes deployment process for. We refer to the example application through out the document to demonstrate the deployment process.

The Windows Deployment Tool The Windows deployment tool is designed to automate the process of creating a deployable folder containing the -related dependencies (libraries, QML imports, plugins, and translations) required to run the application from that folder. It creates a sandbox for or an installation tree for Windows desktop applications, which can be easily bundled into an installation package. The tool can be found in QTDIR/bin/windeployqt. It takes an.exe file or a directory that contains an.exe file as an argument, and scans the executable for dependencies. If a directory is passed with the --qmldir argument, windeployqt uses the qmlimportscanner tool to scan QML files inside the directory for QML import dependencies.

Identified dependencies are then copied to the executable's directory. The hardcoded local paths in Qt5Core.dll are furthermore replaced with relative ones. For Windows desktop applications, the required runtime files for the compiler are also copied to the deployable folder by default (unless the option --no-compiler-runtime is specified). In the case of release builds using Microsoft Visual C++, these consist of the Visual C++ Redistributable Packages, which are intended for recursive installation by the application's installer on the target machine.

Otherwise, the shared libraries of the compiler runtime are used. Pid fajli v torque problems. The application may require additional 3rd-party libraries (for example, database libraries), which are not taken into account by windeployqt. Additional arguments are described in the tools' help output.

Usage: windeployqt [options] [files] Qt Deploy Tool 5.9.0 The simplest way to use windeployqt is to add the bin directory of your Qt installation (e.g. ) to the PATH variable and then run: windeployqt If ICU, ANGLE, etc. Are not in the bin directory, they need to be in the PATH variable. If your application uses Qt Quick, run: windeployqt --qmldir Options: -?, -h, --help Displays this help. -v, --version Displays version information.

--dir Use directory instead of binary directory. --libdir Copy libraries to path. --plugindir Copy plugins to path.

--debug Assume debug binaries. --release Assume release binaries. --pdb Deploy.pdb files (MSVC).

--force Force updating files. --dry-run Simulation mode.

Behave normally, but do not copy/update any files. --no-patchqt Do not patch the Qt5Core library. --no-plugins Skip plugin deployment.

--no-libraries Skip library deployment. --qmldir Scan for QML-imports starting from directory. --no-quick-import Skip deployment of Qt Quick imports. --no-translations Skip deployment of translations.

--no-system-d3d-compiler Skip deployment of the system D3D compiler. --compiler-runtime Deploy compiler runtime (Desktop only).

--no-compiler-runtime Do not deploy compiler runtime (Desktop only). --webkit2 Deployment of WebKit2 (web process). --no-webkit2 Skip deployment of WebKit2. --json Print to stdout in JSON format. --angle Force deployment of ANGLE.

--no-angle Disable deployment of ANGLE. --no-opengl-sw Do not deploy the software rasterizer library. --list Print only the names of the files copied. Available options: source: absolute path of the source files target: absolute path of the target files relative: paths of the target files, relative to the target directory mapping: outputs the source and the relative target, suitable for use within an Appx mapping file --verbose Verbose level. Qt libraries can be added by passing their name (-xml) or removed by passing the name prepended by --no- (--no-xml). Available libraries: bluetooth concurrent core declarative designer designercomponents enginio gui qthelp multimedia multimediawidgets multimediaquick network nfc opengl positioning printsupport qml qmltooling quick quickparticles quickwidgets script scripttools sensors serialport sql svg test webkit webkitwidgets websockets widgets winextras xml xmlpatterns webenginecore webengine webenginewidgets 3dcore 3drenderer 3dquick 3dquickrenderer 3dinput geoservices webchannel texttospeech serialbus Arguments: [files] Binaries or directory containing the binary. Static Linking To build static applications, build Qt statically by configuring Qt with -static.