roscore fails to run
Hello.
After installing turtlebot3
packages (Ubuntu 18.04
, ROS melodic
, following the instruction from here), roscore
fails to run.
Following the traceback, I get the following error message:
File "/opt/ros/melodic/lib/python2.7/dist-packages/rosgraph_msgs/msg/_Log.py", line 8, in <module>
import std_msgs.msg
ImportError: No module named msg
How can I fix this error?
Thanks,
Arnon