OSError: [Errno 13] Permission denied [closed]

edit

Hi All,

I am going through the Learning ROS for Robotics Programming [eBook] but I found an error I can not solve when I try to run my file .launch with

roslaunch beginner_tutorials gazebo.launch model:=urdf/robot1_base_01.xacro

Error:

Traceback (most recent call last):
  File "/opt/ros/indigo/lib/python2.7/dist-packages/roslaunch/__init__.py", line 307, in main
    p.start()
  File "/opt/ros/indigo/lib/python2.7/dist-packages/roslaunch/parent.py", line 268, in start
    self._start_infrastructure()
  File "/opt/ros/indigo/lib/python2.7/dist-packages/roslaunch/parent.py", line 217, in _start_infrastructure
    self._load_config()
  File "/opt/ros/indigo/lib/python2.7/dist-packages/roslaunch/parent.py", line 132, in _load_config
    roslaunch_strs=self.roslaunch_strs, verbose=self.verbose)
  File "/opt/ros/indigo/lib/python2.7/dist-packages/roslaunch/config.py", line 451, in load_config_default
    loader.load(f, config, verbose=verbose)
  File "/opt/ros/indigo/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 746, in load
    self._load_launch(launch, ros_config, is_core=core, filename=filename, argv=argv, verbose=verbose)
  File "/opt/ros/indigo/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 718, in _load_launch
    self._recurse_load(ros_config, launch.childNodes, self.root_context, None, is_core, verbose)
  File "/opt/ros/indigo/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 662, in _recurse_load
    self._param_tag(tag, context, ros_config, verbose=verbose)
  File "/opt/ros/indigo/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 95, in call
    return f(*args, **kwds)
  File "/opt/ros/indigo/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 264, in _param_tag
    value = self.param_value(verbose, name, ptype, *vals)
  File "/opt/ros/indigo/lib/python2.7/dist-packages/roslaunch/loader.py", line 489, in param_value
    p = subprocess.Popen(shlex.split(command), stdout=subprocess.PIPE)
  File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1327, in _execute_child
    raise child_exception
OSError: [Errno 13] Permission denied