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2013-01-03 00:55:37 -0500 answered a question Error launching the openni_tracker

michikarg thanks for the help. The openni_tracker had been uninstalled. To solve the problem I just installed it. But now when I try to run the openni_tracker I get the following message: [ERROR] [1357217210.034954916]: Find user generator failed: This operation is invalid!

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2013-01-02 22:59:48 -0500 asked a question Error launching the openni_tracker

Hi guys,

I am new in Ubuntu and ROS. The system I am using is ROS Fuerte. It is running in the Ubuntu 12.04 Lts.

When I try to open the openni_tracker I get the following error message:

"[rospack] Error: stack / package openni_tracker not found."

Some months - doing the same procedures - I could normally run the openni_tracker. What might be happening?