# Issues with Demo FUNmap Script on Stretch3 **URL:** \ **Category:** Ask\ **Created:** [March 18, 2025, 8:08pm UTC](https://forum.hello-robot.com/t/issues-with-demo-funmap-script-on-stretch3/1268 "2025-03-18T20:08:25Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![bshah](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.hello-robot.com/bshah/32/55_2.png) [@bshah](https://forum.hello-robot.com/u/bshah)\ **Post date:** [March 20, 2025, 7:57pm UTC](https://forum.hello-robot.com/t/issues-with-demo-funmap-script-on-stretch3/1268/4 "2025-03-20T19:57:20Z")
Hey @zyaskawa, the QT error is the issue. > [@zyaskawa](#): > > ```auto > [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")](https://forum.hello-robot.com/t/qt-applications-error-out-due-to-conflict-with-cv2-could-not-load-the-qt-platform-plugin-xcb/1047) Would you try adding the below to `mapping.launch.py`? You’ll need to recompile the Ament workspace as well. ```auto import os os.environ['QT_QPA_PLATFORM_PLUGIN_PATH'] = '/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so' ``` --- _[View the full topic](https://forum.hello-robot.com/t/issues-with-demo-funmap-script-on-stretch3/1268)._