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cannot launch kobuki_dashboard on kinetic

asked 2017-01-23 21:29:16 -0600

ibd gravatar image

updated 2017-01-29 04:20:41 -0600

gvdhoorn gravatar image

Hi, I'm trying to setup a turtlebot on ubuntu 16, ROS kinetic.

Installation went well so far. My laptop and the turtlebot netbook can ping each other. I can roslaunch on the turtlebot fine.

I am following the tutorial at:

When I try the command rqt -s kobuki_dashboard, I get the following error:

RosPluginProvider.load(kobuki_dashboard/KobukiDashboard) exception raised in __builtin__.__import__(kobuki_dashboard.dashboard, [KobukiDashboard]):
Traceback (most recent call last):
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/rqt_gui/", line 77, in load
    module = __builtin__.__import__(attributes['module_name'], fromlist=[attributes['class_from_class_type']], level=0)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/kobuki_dashboard/", line 8, in <module>
    from QtGui import QMessageBox, QAction
ImportError: cannot import name QMessageBox

PluginManager._load_plugin() could not load plugin "kobuki_dashboard/KobukiDashboard":
Traceback (most recent call last):
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/qt_gui/", line 99, in load
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/qt_gui/", line 54, in _load
    self._plugin = self._plugin_provider.load(self._instance_id.plugin_id, self._context)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/qt_gui/", line 71, in load
    instance = plugin_provider.load(plugin_id, plugin_context)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/qt_gui/", line 71, in load
    instance = plugin_provider.load(plugin_id, plugin_context)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/rqt_gui_py/", line 60, in load
    return super(RosPyPluginProvider, self).load(plugin_id, plugin_context)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/qt_gui/", line 71, in load
    instance = plugin_provider.load(plugin_id, plugin_context)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/rqt_gui/", line 83, in load
    raise e
ImportError: cannot import name QMessageBox

Same when I try to launch the dashboard via rosrun kobuki_dashboard kobuki_dashboard.

It seems to be related to QT. Any ideas how to fix?

Cheers Isaac

Edit: If I "fix" the file in question, "", by changing line 8 to:

from PyQt4.QtGui import QMessageBox, QAction

Then python will segfault. Here's a backtrace from gdb:

    #0  0x00007fff9645e5a4 in ?? () from /usr/lib/x86_64-linux-gnu/
#1  0x00007ffff7de74ea in call_init (l=<optimized out>, argc=argc@entry=4, 
    argv=argv@entry=0x7fffffffd858, env=env@entry=0xeb2920) at dl-init.c:72
#2  0x00007ffff7de75fb in call_init (env=0xeb2920, argv=0x7fffffffd858, 
    argc=4, l=<optimized out>) at dl-init.c:30
#3  _dl_init (main_map=main_map@entry=0x2deef60, argc=4, argv=0x7fffffffd858, 
    env=0xeb2920) at dl-init.c:120
#4  0x00007ffff7dec712 in dl_open_worker (a=a@entry=0x7fffffffb310)
    at dl-open.c:575
#5  0x00007ffff7de7394 in _dl_catch_error (
    operate=operate@entry=0x7ffff7dec300 <dl_open_worker>, 
    args=args@entry=0x7fffffffb310) at dl-error.c:187
#6  0x00007ffff7debbd9 in _dl_open (
    file=0x2b49180 "/usr/lib/python2.7/dist-packages/PyQt4/", 
    mode=-2147483646, caller_dlopen=0x5231c3 <_PyImport_GetDynLoadFunc+243>, 
    nsid=-2, argc=<optimized out>, argv=<optimized out>, env=0xeb2920)
    at dl-open.c:660
#7  0x00007ffff75edf09 in dlopen_doit (a=a@entry=0x7fffffffb540) at dlopen.c:66
#8  0x00007ffff7de7394 in _dl_catch_error (objname ...
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Addendum: Maybe this is related to my other problem over here?

ibd gravatar image ibd  ( 2017-01-24 21:52:32 -0600 )edit

If you installed the kobuki packages using apt-get (ie: used a released version), and it's failing like this, that would be something to report over at turtlebot/turtlebot/issues.

gvdhoorn gravatar image gvdhoorn  ( 2017-01-29 04:22:02 -0600 )edit

I did indeed install everything using apt-get. Posted my questions there.

ibd gravatar image ibd  ( 2017-01-30 17:27:58 -0600 )edit

It's always nice to link back to your issue then: turtlebot/turtlebot#250.

gvdhoorn gravatar image gvdhoorn  ( 2017-01-31 01:34:42 -0600 )edit

1 Answer

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answered 2018-04-01 13:41:50 -0600

Rizz gravatar image

The method at fixed the roomba dashboard for me

Thanks for the comment gvdhoorn

simply change QtGui to QtWidgets on the given line number in the file above the first ImportError: ....

also see shows Qt requirements

it seems to be a simple syntax change between Qt4 and Qt5 due to using some new library it would likely also fix other issues with a QMessageBox import error

hope this helps ;- )

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Asked: 2017-01-23 21:29:16 -0600

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Last updated: Apr 01 '18