I can't create a package

edit

I have installed ROS. I did the first two ROS/Tutorials (1. Installing and Configuring Your ROS Environment and 2. Navigating the ROS Filesystem) without problems. However, in the third (Creating a ROS Package) I have problem creating my package.

I do: $ cd ~/ros_workspace $ roscreate-pkg beginner_tutorials std_msgs rospy roscpp

and I get:

Created package directory /home/juliocesar/ros_workspace/beginner_tutorials
Created include directory  /home/juliocesar/ros_workspace/beginner_tutorials/include/beginner_tutorials
Created cpp source directory /home/juliocesar/ros_workspace/beginner_tutorials/src
Created package file /home/juliocesar/ros_workspace/beginner_tutorials/Makefile
Traceback (most recent call last):
  File "/opt/ros/electric/ros/bin/roscreate-pkg", line 35, in <module>
roscreate.roscreatepkg.roscreatepkg_main()
  File "/opt/ros/electric/ros/tools/roscreate/src/roscreate/roscreatepkg.py", line 126, in roscreatepkg_main
create_package(package, author_name(), depends, uses_roscpp=uses_roscpp, uses_rospy=uses_rospy)
  File "/opt/ros/electric/ros/tools/roscreate/src/roscreate/roscreatepkg.py", line 94, in create_package
f.write(contents)
UnicodeEncodeError: 'ascii' codec can't encode character u'\xed' in position 122: ordinal not in range(128)

It isn't like it must be, and the next commands don't work of course.

I don't know how to solve it...

Thanks.