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gnieboer / GNURadio_Windows_Build_Scripts

A series of Powershell scripts to automatically download, build from source, and install GNURadio and -all- it's dependencies as 64-bit native binaries then package as an msi using Visual Studio 2015
GNU General Public License v3.0
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Could not find Qt platform plugin "windows" in "C:\Program Files\GNURadio-3.8\bin\\plugins\platforms" #48

Closed WA1CYB closed 3 years ago

WA1CYB commented 4 years ago

Installed 3.8.1 without issues Ran GRC Loaded a QT frequency sink in a flowgraph Received this error message: qt.qpa.plugin: Could not find Qt platform plugin "windows" in "C:\Program Files\GNURadio-3.8\bin\plugins\platforms" This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Done (return code -1073740791)

Is the \plugins\platforms meant to be a UNC Network path?

gnieboer commented 4 years ago

Sorry, I could not duplicate.
That directory should exist, having been created during install, not a UNC path. There should be a file in that directory called "qwindows.dll". Does that exist?

WA1CYB commented 4 years ago

The file exists. It appears your script put a double backslash, instead of a single one so the dll can't be found. "C:\Program Files\GNURadio-3.8\bin\plugins\platforms"  instead of  "C:\Program Files\GNURadio-3.8\bin\plugins\platforms"

In the "C:\Program Files\GNURadio-3.8\bin\plugins\platforms" directory there are the dll's:  qdirect2d.dll qwindows.dll qoffscreen.dll and qminimal.dll

On Thursday, July 23, 2020, 04:03:29 PM EDT, Geof Nieboer <notifications@github.com> wrote:

Sorry, I could not duplicate. That directory should exist, having been created during install, not a UNC path. There should be a file in that directory called "qwindows.dll". Does that exist?

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

gnieboer commented 4 years ago

Well, you can remove the / before /plugins in the run_gr.bat file, but that really shouldn't be having an effect. Windows ignores the extra slashes when it finds them (enter cd c:\windows\\system to confirm).

Those are the correct DLL's, so that part is good.

Let me know if the slash removal works.

fksms commented 4 years ago

The problem can be avoided by editing "C:\Program Files\GNURadio-3.8\bin\run_gr.bat".

"set QT_QPA_PLATFORM_PLUGIN_PATH=%~dp0\platforms" "set QT_PLUGIN_PATH=%~dp0..\plugins"

Please change as above and save. It should work correctly.

I made a pull request to solve this problem. See #49.

JochemsMatz commented 3 years ago

I can confirm that this fix worked for me with GNU RC 3.8.1.0 under Windows 10.

busycraftsman commented 3 years ago

I have the same problem, I solved this problem by create a plugins folder in ".\GNURadio-3.8\bin", and move the platforms folder into the plugins folder.

I think this is a wrong package script cause this problem.

gnieboer commented 3 years ago

A new windows installer for 3.8.2 has been released here that sorts this path issue out.

If further issues are discovered, please open a new issue (as it should be a different root cause)

AhmedKAwwad commented 3 years ago

The problem can be avoided by editing "C:\Program Files\GNURadio-3.8\bin\run_gr.bat".

"set QT_QPA_PLATFORM_PLUGIN_PATH=%~dp0\platforms" "set QT_PLUGIN_PATH=%~dp0..\plugins"

Please change as above and save. It should work correctly.

I made a pull request to solve this problem. See #49.

Actually worked for me Thanks a lot