Roslaunch error: Bad argument __name:=

edit

Hi there,

I have a ros node that runs without problem when it's called by rosrun, but dies without reason when called by a roslaunch:

NODES
  /
    CalibrateInt (tracking/calibrateInt)

ROS_MASTER_URI=http://localhost:11311

core service [/rosout] found
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[CalibrateInt-1]: started with pid [27132]
ERROR: 
  Bad argument __name:=CalibrateInt

[CalibrateInt-1] process has died [pid 27132, exit code 255, cmd /home/guillem/ros_workspace/Armed-turtlebot/tracking/bin/calibrateInt __name:=CalibrateInt __log:=/home/guillem/.ros/log/7c0acfb0-2f0e-11e2-948f-446d5719810b/CalibrateInt-1.log].
log file: /home/guillem/.ros/log/7c0acfb0-2f0e-11e2-948f-446d5719810b/CalibrateInt-1*.log
all processes on machine have died, roslaunch will exit
shutting down processing monitor...
... shutting down processing monitor complete
done

launchfile:

<launch>
     <node pkg="tracking" type="calibrateInt" name="CalibrateInt"/>
</launch>