Invalid <param> tag: Cannot load command parameter [rosversion]: command [rosversion roslaunch] returned with code[1]

asked 2015-10-06 05:00:41 -0500

queue
3 ●1 ●2 ●2

updated 2015-10-06 07:28:19 -0500

gvdhoorn
86574 ●283 ●1432 ●1054 http://cor.tudelft.nl/

while executing ros4mat I am getting this error:

tanisha@tanisha-HS:~$ roslaunch ros4mat ros4mat.launch
WARNING: unable to configure logging. No log files will be generated
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

Invalid <param> tag: Cannot load command parameter [rosversion]: command [rosversion roslaunch] returned with code [1].

Param xml is <param command="rosversion roslaunch" name="rosversion"/>

edit retag flag offensive close merge delete

Comments

What do you get for rosversion roslaunch on the command line?

dornhege ( 2015-10-06 05:03:40 -0500 )edit

add a comment

0

answered 2020-11-09 10:29:56 -0500

rgov
130 ●9 ●25 ●22

roslaunch tries to start the roscore nodes by loading the roscore launch file from your ROS distribution, for instance /opt/ros/melodic/etc/ros/roscore.xml. This launch file instructs roslaunch to execute rosversion roslaunch.

If rosversion roslaunch fails for some reason, this error will occur. You should try to run this command separately to see what error is displayed.

A reason why it might fail is if your ROS environment variables are not correct. You should be using source /opt/ros/melodic/setup.bash or similar (see this tutorial), plus a separate Catkin workspace file, to populate variables.

I encountered this issue myself because I was overriding ROS_PACKAGE_PATH incorrectly. Once I fixed it, the error went away.