Hi, I have some problems to ask your help! I use kinect with openni. after running rosrun rviz rviz, the log shows, [ INFO] [1297759443.332189019]: Loading general config from [/home/nutan/.rviz/config] [ INFO] [1297759443.342981796]: Loading display config from [/home/nutan/.rviz/display_config] [ERROR] [1297759444.477791717]: No techniques available for material [PointCloudMaterial0BillboardSphere] [ERROR] [1297759444.479695234]: No techniques available for material [PointCloudMaterial0Billboard] [ERROR] [1297759444.558933075]: No techniques available for material [PointCloudMaterial0Billboard] Although RViz appears, flashing green light on the kinect sensor(may be because the sensor is connected but it can't be verified. Then, I set the Fixed Frame to openni_depth_optical_frame, and added a Point Cloud2 display, and set the topic to /camera/depth/points2. Turning the background to light gray. In another terminal, i used rosrun image_view image_view image_view image:=/camera/rgb/image_color, and the log is, terminate called after throwing an instance of 'image_transport::TransportLoadException' what(): Unable to load plugin for transport 'image_view', error string: According to the loaded plugin descriptions the class image_transport/image_view_sub with base class type image_transport::SubscriberPlugin does not exist. Declared types are image_transport/raw_sub Aborted Please help me check the mistakes!**