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Tutorials - Understanding ROS Nodes

asked 2012-08-02 04:23:54 -0600

Janina gravatar image


I have Ubuntu 10.04 and installes ROS electric.

I am trying to make $ rosmake turtlesim (Tutorials - Understanding ROS Nodes), but get following error message:

rosmake Packages requested are: ['turtlesim']
rosmake Logging to directory/home/janina/.ros/rosmake/rosmake_output-20120802-160904 rosmake Expanded args ['turtlesim'] to: []
rosmake WARNING: The following args could not be parsed as stacks or packages: ['turtlesim'] rosmake ERROR: No arguments could be parsed into valid package or stack names.

How can I install the turtlesim package? I think it,s missing?

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answered 2012-08-05 08:46:22 -0600

You need to export the package paths correctly. As you allready noticed your packages can not be found. The reason is most likely that you did not correct setup the ROS_PACKAGE_PATH variable.

you can check the Path by:


The output shows the paths which ROS is searching for Packages.

Check also this page here

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answered 2012-08-02 04:44:24 -0600

KruseT gravatar image

The tutorial assumes you have first completed the tutorial before:

That's where it explains how to get turtlesim.

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answered 2012-08-06 01:29:56 -0600


Turtlesim comes as a stack by default with your ros-electric installation. However, if you believe its still missing you may Click here to obtain the package from the ROS website.

As said by tlinder you may have to check your $ROS_PACKAGE_PATH in order to see if ros is able to locate the package present in your folders. We may be able to help further if you can post the output of the following command:



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answered 2012-08-05 03:35:03 -0600

Janina gravatar image

But when I try for example from the first tutorial "NavigationTheFilesystem" roscd turtle I get the message that no turtle package is found...

What can I do that I have this package?

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do not ask more question as an answer, use edit on the question and add to it.

KruseT gravatar image KruseT  ( 2012-08-05 10:16:51 -0600 )edit

If you have typed just roscd turtle it won't work.... coz it should actually be roscd turtlesim

SivamPillai gravatar image SivamPillai  ( 2012-08-20 04:57:50 -0600 )edit

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Asked: 2012-08-02 04:23:54 -0600

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Last updated: Aug 06 '12