Error when calling catkin_make --> Invoking "make" failed'

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Hi,

I'm new to ROS. I was following exactly the steps listed here: http://pharos.ece.utexas.edu/wiki/ind...

However, when I run catkin_make, i got the following error:

user@ubuntu:~/catkin_ws$ catkin_make
Base path: /home/user/catkin_ws
Source space: /home/user/catkin_ws/src
Build space: /home/user/catkin_ws/build
Devel space: /home/user/catkin_ws/devel
Install space: /home/user/catkin_ws/install
####
#### Running command: "make cmake_check_build_system" in "/home/user/catkin_ws/build"
####
####
#### Running command: "make -j2 -l2" in "/home/user/catkin_ws/build"
####
[  3%] [  3%] Built target geometry_msgs_generate_messages_cpp
Generating dynamic reconfigure files from cfg/TurtleBot.cfg: /home/user/catkin_ws/devel/include/irobotcreate_node/TurtleBotConfig.h /home/user/catkin_ws/devel/lib/python2.7/dist-packages/irobotcreate_node/cfg/TurtleBotConfig.py
../catkin_generated/env_cached.sh: 16: exec: /home/user/catkin_ws/src/irobotcreate_node/cfg/TurtleBot.cfg: Permission denied
make[2]: *** [/home/user/catkin_ws/devel/include/irobotcreate_node/TurtleBotConfig.h] Error 126
make[1]: *** [irobotcreate_node/CMakeFiles/irobotcreate_node_gencfg.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
[  3%] Built target diagnostic_msgs_generate_messages_cpp
make: *** [all] Error 2
Invoking "make" failed
user@ubuntu:~/catkin_ws$

How do I solve this?