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For the 3rd question here is the answer: double red circle means that the Master reports the node exists, but rxgraph cannot talk to that node.

Can you please post the launch file you use or the nodes you run?

For the 3rd question here is the answer: double red circle means that the Master reports the node exists, but rxgraph cannot talk to that node.

Can you please post the launch file you use or the nodes you run?

EDIT:

Can you please use the preformatted text for code? In this way is a little bit unreadable... Anyway at a first look, why don't you use the standard 'openni_launch openni.launch' for the kinect sensor? Moreover it seems that you are running two nodes both for the fake laser (in test.launch and launch_kinect.launch) and for the static_transform_publisher (in launch_kinect.launch and slam_cg.launch).

I suggest you to better look at the tutorials of the navigation stack.