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roscore error

asked 2014-02-26 08:59:11 -0500

GWall gravatar image

updated 2014-02-26 09:58:31 -0500

ahendrix gravatar image

I have searched but have not found anything that adequately solves my problem. When I type in "roscore" to test ros and make sure my installation was successful it displays this error:

roscore invalid <param>  tag: Cannot load command parameter [rosversion]: command [rosversion roslaunch] returned with code [1] 
Param xml is <param command="rosversion roslaunch" name="rosversion"/>

Any help is appreciated!

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What is your OS and ROS version? Have you installed from binaries or from source?

ahendrix gravatar image ahendrix  ( 2014-02-26 09:39:32 -0500 )edit

I'm using Ubuntu 12.04 and ROS version hydro

GWall gravatar image GWall  ( 2014-02-26 09:53:27 -0500 )edit

What do you get if you run `rosversion roslaunch` manually?

ahendrix gravatar image ahendrix  ( 2014-02-26 09:59:13 -0500 )edit

It says "Cannot locate [roslaunch]

GWall gravatar image GWall  ( 2014-03-03 02:20:01 -0500 )edit

4 Answers

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answered 2014-03-03 06:14:53 -0500

ahendrix gravatar image

This is usually symptomatic of not having your ROS_PACKAGE_PATH set correctly.

This usually happens if you either:

  • Haven't sourced /opt/ros/hydro/setup.bash or
  • You've overwritten your ROS_PACKAGE_PATH instead of appending to it
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how would i go about checking for these issues?

GWall gravatar image GWall  ( 2014-03-03 06:45:42 -0500 )edit

What do you get for env | grep ROS?

dornhege gravatar image dornhege  ( 2014-03-03 06:50:33 -0500 )edit

This is what I got: ROS_ROOT=/opt/ros/hydro/share/ros... ROS_PACKAGE_PATH=/home/forklift/forklift-workspace:ROS_PACKAGE_PATH... ROS_MASTER_URI=http://localhost:11311... ROS_HOSTNAME=localhost... ROSLISP_PACKAGE_DIRECTORIES=... ROS_DISTRO=hydro... ROS_ETC_DIR=/opt/ros/hydro/etc/ros...

GWall gravatar image GWall  ( 2014-03-03 06:54:40 -0500 )edit
1

Please update your question with this so it's readable. The exact output is important. Is there a literal "ROS_PACKAGE_PATH" in your ROS_PACKAGE_PATH?

dornhege gravatar image dornhege  ( 2014-03-03 22:51:21 -0500 )edit

I appreciate your help! Your last comment gave me a thought and so I went to check the path and discovered that I had removed that file so ROS was searching for something that didn't exist. I checked with it in and its been working!!

GWall gravatar image GWall  ( 2014-03-10 08:08:07 -0500 )edit
2

answered 2018-03-13 02:09:46 -0500

Amos gravatar image

I met this error when I have a grammar error in package.xml. When I correct the error, roscore and catkin_make can work.

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answered 2016-01-04 03:53:05 -0500

vmlane gravatar image

I had this same problem when one of my package.xml files had a parsing error. The package was in my catkin_ws which was on my ROS_PACKAGE_PATH.

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Hi !!! How did you resolve this issue than?

Mateen gravatar image Mateen  ( 2020-11-23 07:34:29 -0500 )edit
0

answered 2020-06-11 23:19:26 -0500

Rahul K R gravatar image

I have the same issue. The above solutions did not work for me.

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Asked: 2014-02-26 08:59:11 -0500

Seen: 5,003 times

Last updated: Jun 11 '20