No transform from [robot_1/base_link] to [/map]

I want to use 'Gmapping' with multiple robots. I checked the 'robot1/scan' value with the actual robot, and designated namespace to distinguish the robots. However, rviz generates warnings such as 'No transform from [robot1/base_link] to frame [map]' and does not display the laser and map. What's the problem? Screenshot from 2022-09-30 18-36-21

Asked by leejaewon on 2022-09-30 04:41:13 UTC

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No transform from [robot_1/base_link] to frame [map]'

Clearly, you can see there are two trees in your first screenshot. Moreover, you may notice that robot_1/base_link and map are in two different trees. This is why there is no such transformation available.

Asked by ravijoshi on 2022-09-30 06:07:59 UTC

No transform from [robot_1/base_link] to [/map]

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