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Catkin naming conventions issue

asked 2020-10-12 13:13:03 -0600

Bjb0403 gravatar image

updated 2020-10-12 13:38:04 -0600

gvdhoorn gravatar image

I'm having trouble creating a package called 'local_frontiers'

As far as i know, i'm following the correct naming conventions, i have no idea why i'm getting this error.

$ catkin_create_pkg ​local_frontiers rospy roscpp
Traceback (most recent call last):
  File "/usr/bin/catkin_create_pkg", line 11, in <module>
    load_entry_point('catkin-pkg==0.4.22', 'console_scripts', 'catkin_create_pkg')()
  File "/usr/lib/python2.7/dist-packages/catkin_pkg/cli/", line 62, in main
  File "/usr/lib/python2.7/dist-packages/catkin_pkg/", line 143, in _create_package_template
  File "/usr/lib/python2.7/dist-packages/catkin_pkg/", line 55, in __init__
  File "/usr/lib/python2.7/dist-packages/catkin_pkg/", line 316, in validate
    raise InvalidPackage('\n'.join(errors), self.filename)
catkin_pkg.package.InvalidPackage: Package name "​local_frontiers" does not follow naming conventions
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1 Answer

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answered 2020-10-13 01:11:56 -0600

mgruhler gravatar image

Seems you added a zero-width space character right in front of the local_frontiers name. catkin_create_pkg (rightfully so) only accepts lower and upper case letters, as well as numbers at the start of the package name.

(you see the zero-width space when you c'n'p the command you posted above, save it to a text file and open this with e.g. vim: catkin_create_pkg <200b>local_frontiers rospy roscpp)

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Ha, nice.

@Bjb0403: did you copy-paste the package name from a .pdf or similar file perhaps?

gvdhoorn gravatar image gvdhoorn  ( 2020-10-13 03:03:36 -0600 )edit

must have been something like that. I'd say there is no way to accidentally get that character typed in the terminal. If it is possible at all...

mgruhler gravatar image mgruhler  ( 2020-10-13 03:50:48 -0600 )edit

Or it's a test, to see whether you are paying attention and the ROS Answers crew can figure this one out.

gvdhoorn gravatar image gvdhoorn  ( 2020-10-13 03:54:15 -0600 )edit

Typed it out, it's a custom package i'm working on. Bizzare.

Bjb0403 gravatar image Bjb0403  ( 2020-10-13 04:39:21 -0600 )edit

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Asked: 2020-10-12 13:13:03 -0600

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Last updated: Oct 13 '20