QCAD.org Forum

qcad-3.31.2-pro-linux-qt5.14-x86_64
interactive target ubuntu 24.04 desktop
headless target ubuntu 24.04 server

I have written a script that functions either interactively if qcad is started without a user argument --path= on the command line or "automatically" if the --path argument is present.

qcad -platform offscreen -no-gui -exec File/PRformalDwg/PRformalDwg.js --path="\$panelRightMntDir/Development/panelizerOut"
Is a command line that works on ubuntu 24.04 desktop. The debug statements at startup prior to the user script starting are:

mark@Z790-AORUS-ELITE-AX:~/opt/qcad-3.31.2-pro-linux-qt5.14-x86_64/scripts$ qcad -platform offscreen -no-gui -exec File/PRformalDwg/PRformalDwg.js --path="\$panelRightMntDir/Development/panelizerOut"
QCAD version 3.31.2
11:37:35: Debug: loading plugins...
11:37:35: Debug: RHelpPlugin::init
11:37:35: Debug: RPolygonPlugin::init
11:37:35: Debug: RProScriptsPlugin::init
11:37:35: Debug: RProxiesPlugin::init
11:37:35: Debug: RTracePlugin::init
11:37:35: Debug: RDwgPlugin::init
11:37:35: Debug: loading static plugins...
11:37:35: Debug: LayerListPro.init
11:37:35: Debug: loading plugins...
11:37:35: Debug: loading static plugins...
Warning: This plugin does not support propagateSizeHints()
11:37:35: Debug: loading plugins...
11:37:35: Debug: loading static plugins...
11:37:35: Debug: openFiles: -allow-multiple-instances,-no-gui,-exec,File/PRformalDwg/PRformalDwg.js,--path=$panelRightMntDir/Development/panelizerOut


However, that same command line executed on ubuntu 24.04 server hangs after the Warning: This plugin does not support propagateSizeHints() statement. The application hangs before the "loading plugins..." statement found in ../sourceCode/src/core/RPluginLoader.cpp: qDebug() << "loading plugins...";

Since my script does not even get a chance to run, it seems I need to add more to the server environment to make qcad happy.

Suggestions?

Thanks.

To debug plugins, you can set
This should give you some more information.

You also might want to check for missing libraries in plugins using ldd.

I went as far as I could with ldd and QT_DEBUG_PLUGINS=1 and did not find a missing dependency based on what the debug statements claimed were being loaded. I then spun up another virtual machine of Xubuntu 24.04 minimal desktop, and qcad seems to hang at the same location. A third virtual machine with the same Ubuntu 24.04 desktop that I run on the physical machine runs qcad fine, do I don't think I can blame the KVM environment. I can meet my needs with this configuration but might poke again at how lightweight a system will support qcad in the future.

Thanks for your suggestions. They helped me refine my skills at troubleshooting a bit, though they are still pretty rough.