Issues with Demo FUNmap Script on Stretch3

[bshah]

Hey @zyaskawa, the QT error is the issue.

@zyaskawa

[rviz2-7] QObject::moveToThread: Current thread (0x5cf4c763a170) is not the object's thread (0x5cf4c7642640).
[rviz2-7] Cannot move to target thread (0x5cf4c763a170)
[rviz2-7] 
[rviz2-7] qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/home/hello-robot/.local/lib/python3.10/site-packages/cv2/qt/plugins" even though it was found.
[rviz2-7] This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
[rviz2-7] 
[rviz2-7] Available platform plugins are: xcb, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc.
[rviz2-7] 

@Mohamed_Fazil has more details about the issue in his post here: QT applications error out due to conflict with cv2 (Could not load the Qt platform plugin "xcb")

Would you try adding the below to mapping.launch.py? You’ll need to recompile the Ament workspace as well.

import os

os.environ['QT_QPA_PLATFORM_PLUGIN_PATH'] = '/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so'