Hello,

I'm experiencing exactly the same with Ubuntu 11.04. 

<code>
$rosrun image_view image_view image:=/gscam/image_raw
init done 

(<unknown>:29973): GLib-GObject-WARNING **: invalid uninstantiatable type `(null)' in cast to `GtkWidget'

(<unknown>:29973): GLib-GObject-WARNING **: instance of invalid non-instantiatable type `(null)'

(<unknown>:29973): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
</code>

Did any solution pop up since last August? :)

--Bence

2011/8/6 Carlos J. <ubuntuslave@gmail.com>


On Fri, Aug 5, 2011 at 6:23 PM, Jack O'Quin <jack.oquin@gmail.com> wrote:
On Fri, Aug 5, 2011 at 5:13 PM, Carlos J. <ubuntuslave@gmail.com> wrote:
> Perhaps, it's only my case, but I'm experiencing problems with
> image_pipeline packages, such as image_view and camera_calibration. They
> seem related to wxWidgets. These problems occur only under electric. The
> same packages seem to work fine under diamondback. I'm just crying out loud
> to see if it's not just me who is experiencing this.

More information would be helpful.

What system are you running? What packages did you try?

I'm using Ubuntu 11.04 and these 2 problems (that I'm aware of) only happens only in ROS Electric.

1) When trying to run "image_view" (with all kind of images...tried different Image topics), I get this:
   $ rosrun image_view image_view image:=/camera/rgb/image_color
   [rospack] warning: ignoring duplicate "nodelet" tag in export block
   init done 
   opengl support available 

   (<unknown>:15605): GLib-GObject-WARNING **: invalid uninstantiatable type `(null)' in cast to `GtkWidget'

   (<unknown>:15605): GLib-GObject-WARNING **: instance of invalid non-instantiatable type `(null)'

   (<unknown>:15605): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

2) With "camera_calibration", I get errors as following:
   $ rosrun camera_calibration cameracalibrator.py BLABLABLAH
   Traceback (most recent call last):
     File "/opt/ros/electric/stacks/image_pipeline/camera_calibration/nodes/cameracalibrator.py", line 50, in <module>
       import cv2
   ImportError: /usr/local/lib/python2.7/dist-packages/cv2.so: undefined symbol: _ZNK2cv5flann5Index12getAlgorithmEv

What results did you expect? What did you get?
None of these problems occur when I use (switch back) to diamondback. The packages work as expected in diamondback. I have tried both binary and from-source packages with the same results.

I hope this could give you an idea of the problem.

Thanks a lot for looking into it!

Carlos

 
--
 joq
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