# Error starting ros1\_bridge

**URL:** <https://get-help.theconstruct.ai/t/error-starting-ros1-bridge/10441>\
**Category:** ROS2 In 5 Days Python\
**Created:** [June 9, 2021, 4:23am UTC](https://get-help.theconstruct.ai/t/error-starting-ros1-bridge/10441 "2021-06-09T04:23:38Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![roalgoal](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/roalgoal/32/7280_2.png) [@roalgoal](https://get-help.theconstruct.ai/u/roalgoal)\
**Post date:** [June 9, 2021, 8:28am UTC](https://get-help.theconstruct.ai/t/error-starting-ros1-bridge/10441/2 "2021-06-09T08:28:47Z")

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Hi,

Like it shows in the course, in the terminal that you are launching the bridge you must source ROS noetic first, and then ROS foxy:

> source /opt/ros/noetic/setup.bash  
> source /opt/ros/foxy/setup.bash

Then, you can run the bridge. I will update the notebook to specify the sourcing.

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_[View the full topic](https://get-help.theconstruct.ai/t/error-starting-ros1-bridge/10441)._