Importing URDF throws ros::TimeNotInitializedException

Hello, I am trying to work with NAO (V50). I need to use modified limits (modified urdf as attachment), because NAO has skin added onto him, which changed the limits. I even tried to use https://raw.githubusercontent.com/ros-naoqi/nao_robot/master/nao_description/urdf/naoV50_generated_urdf/nao.urdf but that trhows the same error. Any idea? When I looked up this error, I found it could be ( http://lists.ros.org/pipermail/ros-users/2010-June/055556.html ). The example code for pr2 works just fine.

Thanks

from naoqi import ALProxy
from trac_ik_python.trac_ik import IK
import rospy

dataPath = "no-shoulders/"
urdfName = "data"

with open('data/'+ dataPath +'limits/'+ urdfName +'.urdf', 'r') as file:
    urdf=file.read()

Solver = IK("Torso_link", "LShoulderPitch_link", urdf_string=urdf) # version I posted does actually need to have suffix _link ommited.

Ends with: terminate called after throwing an instance of 'ros::TimeNotInitializedException' what(): Cannot use ros::Time::now() before the first NodeHandle has been created or ros::start() has been called. If this is a standalone app or test that just uses ros::Time and does not communicate over ROS, you may also call ros::Time::init() Neúspěšně ukončen (SIGABRT) (core dumped [obraz paměti uložen])

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