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2019-06-17 19:55:30 -0500 answered a question ImportError: No module named rosmsg

i had resolve this problem. its reason is i set "export PATH=...." not "export PATH=${PATH}:...".

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2019-06-17 04:51:27 -0500 asked a question ImportError: No module named rosmsg

ImportError: No module named rosmsg When i install ros-melodic on machine 18.04.02, firstly installed catkin by aptitude