rviz fail to start because it could not find or load the Qt platform plugin about rosonwindows HOT 8 CLOSED

set QT_PLUGIN_PATH=c:\opt\rosdeps\x64\plugins don't add any space around =.

from rosonwindows.

We had a similar problem when trying to run RViz on machine in which another Qt dll was already present in the User Path (this can be the case if an application has some local Qt dll and is part of the path). In that case, I typically suggest to open the RViz binary with https://github.com/lucasg/Dependencies from the ROS command line and verify which Qt dll is actually loaded by the program.

from rosonwindows.

Thank for trying out ROS on Windows!

As of the error which cannot find QT platform, can you describe more what message you saw? Or screenshot?

Also it would be helpful to post the following output about your environment:

:: assume you have roscore running in another command prompt.
:: first, run the setup.bat
c:\opt\ros\melodic\x64\setup.bat

:: dump the following env variables
set ROS
set QT
set PATH

:: dump what's installed locally
choco list -lo

:: enable verbose logging for rviz
rosrun rviz rviz -l

from rosonwindows.

Hi,
Info of env variable:

1. ROS:
   ROS_DISTRO=melodic
   ROS_ETC_DIR=C:/opt/ros/melodic/x64/etc/ros
   ROS_MASTER_URI=http://localhost:11311
   ROS_PACKAGE_PATH=C:/opt/ros/melodic/x64\share
   ROS_PYTHON_VERSION=2
   ROS_ROOT=C:/opt/ros/melodic/x64/share/ros
   ROS_VERSION=1
2. Qt, Only one line.
   QtMsBuild=C:\Users\Administrator\AppData\Local\QtMsBuild
3. My PATH is very long, so I pick all the ROS involved outpu.
   The detail file is attached.
   C:/opt/ros/melodic/x64\lib;
   C:/opt/rosdeps/x64\lib;
   C:/opt/ros/melodic/x64\bin;
   C:/opt/rosdeps/x64\bin;
   C:\opt\python27amd64;
   C:\opt\python27amd64\Scripts;
   C:\ProgramData\chocolatey\bin;
   C:\opt\rosdeps\x64;
   C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin;
   C:\Program Files (x86)\Microsoft Visual
   PATH.txt
   Studio\2017\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\Ninja
4. The choco list result:
   Chocolatey v0.10.11
   assimp 4.0.1.1809242322
   boost 1.66.0.1809242326
   bullet3 2.87.0.1809242326
   bzip2 1.0.6.1809242322
   chocolatey 0.10.11
   chocolatey-core.extension 1.3.3
   console_bridge 0.4.0.1809242322
   cppunit 1.12.1.1809242322
   eigen 3.3.4.1809242322
   git 2.20.1
   git.install 2.20.1
   google-mock 1.8.0.1809242326
   google-test 1.8.0.1809242322
   libcurl 7.58.0.1809242322
   libgraphviz 2.41.0.1810022039
   libopencv 3.4.1.1809242322
   log4cxx 0.10.0.1809242322
   lz4 1.8.1.1809242322
   ogre 1.10.11.1809100020
   openssl 1.1.1.1809242322
   pkg-config 0.29.2.1809242322
   poco 1.8.1.1809242322
   pyqt5 5.10.1.1809242322
   pyside2 5.10.1.1809242322
   qt5-sdk 5.10.1.1810112239
   ros-catkin-tools 0.0.1.1811160029
   ros-cmake 3.11.4.1809242322
   ros-melodic-desktop 20181221.1
   ros-python2 2.7.15.1809242354
   sbcl 0.0.0.1809242326
   sdl 1.2.15.1809242322
   sdl_image 1.2.12.1809242322
   sip 4.19.8.1809242322
   tinyxml 2.6.2.1809242322
   tinyxml2 6.1.0.1809242322
   urdfdom 1.0.0.1809242322
   urdfdom_headers 1.0.0.1809242322
   vcpython27 9.0.30729.1809090720
   yaml-cpp 0.5.3.1809242322
   39 packages installed.
   Besides,
   The error only tell me can't find Qt plugin, no other error.
   screenshot is attached:
   

from rosonwindows.

It's very likely that your environment is missing QT_PLUGIN_PATH. Can you try to run the following?

:: first, run the setup.bat
c:\opt\ros\melodic\x64\setup.bat

:: manually set QT_PLUGIN_PATH
set QT_PLUGIN_PATH=c:\opt\ros\melodic\x64\plugins

:: run rviz
rosrun rviz rviz -l

If it works, then I guess there is some problem in C:\opt\ros\melodic\x64\etc\catkin\profile.d\1.ros_misc.bat, particularly the output of where qt5core.dll. Can you try to run it manually to see any interesting values there?

from rosonwindows.

Hi
Rviz can open in my side.
Notice! the Qt_pulgin_path is C:\opt\rosdeps\x64\plugins.
thanks

from rosonwindows.

Closed it because set QT_PLUGIN_PATH=c:\opt\rosdeps\x64\plugins seems to work for this case.

from rosonwindows.

when i set QT_PLUGIN_PATH=c:\opt\ros\melodic\x64\plugins QT_QPA_PLATFORM_PLUGIN_PATH=C:\opt\ros\melodic\x64\plugins\platforms, i still got the error:
qt.qpa.plugin: Could not load the Qt platform plugin "windows" in "C:\opt\ros\melodic\x64\plugins\platforms" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: direct2d (from C:\opt\ros\melodic\x64\plugins\platforms), minimal (from C:\opt\ros\melodic\x64\plugins\platforms), offscreen (from C:\opt\ros\melodic\x64\plugins\platforms), windows (from C:\opt\ros\melodic\x64\plugins\platforms), direct2d, minimal, offscreen, windows.

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