Can i downgrade ROS?

asked 2021-12-18 13:36:12 -0500

aspq gravatar image

I need ROS melodic for my project. But i already installed noetic. Can i downgrade it? or can i use both if i install melodic?

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What operating system are you using?

osilva gravatar image osilva  ( 2021-12-18 14:50:01 -0500 )edit

ubuntu 20.04

aspq gravatar image aspq  ( 2021-12-18 16:16:18 -0500 )edit

Melodic is recommended to run with Ubuntu 18.04. I wouldn’t recommend installing both in Ubuntu 20.04. Everything is possible but this configuration is not supported. Also Python 3 is native in Ubuntu 20.04 so some of your melodic applications might not work either as they might use Python 2.7

Perhaps you can consider virtual environment to have them co-exist.if you go back to ROS Melodic then Ubuntu 18.04 as recommended.

osilva gravatar image osilva  ( 2021-12-18 17:23:42 -0500 )edit

I would suggest to take a step back, and ask @aspqwhy (s)he believes "ROS melodic [is needed] for [his] project".

gvdhoorn gravatar image gvdhoorn  ( 2021-12-19 07:36:32 -0500 )edit

You are right @gvdhoorn considering Melodic will be unsupported in the near future, the first question should be why not use Noetic

osilva gravatar image osilva  ( 2021-12-19 19:40:09 -0500 )edit

let me clarify that i was so confused about ros and dont know what to do for my final project. But finally i figure it out how use ros and i dont need to downgrade my ROS version. I was thinkin i have to use melodic for some packages and i figure that out thats not necesarry for that. But thank you for your helps.

aspq gravatar image aspq  ( 2021-12-19 20:14:01 -0500 )edit