LibreCAD
2.2.2_alpha_latest plugins qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow
Installed 2.2.2_alpha_latest on Windows 11 (x64) over previous latest stable release 2.2.1.2-win64 and now I get this error on startup of LibreCAD... Window loads, but not all functionality works correctly...
C:/Program Files/LibreCAD/resources/plugins
qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow
qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow
qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow
qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow
qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow
qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow
qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow
qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow
qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow
qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow
qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow
Update:
Reinstalling 2.2.1.2 results in a loading error of:
Failed to extra plugin meta data from 'C:/Program Files/LibreCAD/resources/plugins/*.dll
Where * represents nearly all .dll's which should be in ../plugins directory
@fowlerovski
try to uninstall LibreCAD; delete all plugins dll files (as shown at C:/Program Files/LibreCAD/resources/plugins/); reinstall LibreCAD.
The issue appears to be due to version mismatch from leftover plugins
Thank you @dxli I uninstalled, and deleted the Program Files\LibreCAD folder then reinstalled the alpha version.
Still seeing these errors in the cli, even though they do not popup as fatal with individual Windows notifications (as previously):
C:/Program Files/LibreCAD/resources/plugins qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow qt.core.qobject.connect: QObject::connect: signal not found in QC_ApplicationWindow
The ..\Program Files\LibreCAD\resources\plugins folder appears to be fully populated with the clean alpha install.
@fowlerovski
Those warnings indicates a bug in plugins, and should be fixed. Thanks for sharing the info.
As a minor note, I would add that the LibreCAD icon is missing from the compiled .exe, so a generic application icon is showed instead in the Start Menu and Windows Taskbar.
This is:
Version: 2.2.2.3-alpha
Compiler: Microsoft Visual C++
Compiled on: Aug 29 2025
Qt Version: 6.10.0
Boost Version: 1.87.0
System: Windows 11 Version 24H2
