source_frame in tf2 frame_ids cannot start with a '/' like

[ERROR] [1561118780.508600034]: TF Exception that should never happen for sensor frame: , cloud frame: /camera_depth_frame, Invalid argument "/camera_depth_frame" passed to lookupTransform argument source_frame in tf2 frame_ids cannot start with a '/' like:
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ncnynl

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主要问题是turtlebot_bringup的3dsensor.launch 里面的
<param name="output_frame_id" value="/$(arg camera)_depth_frame"/>

去掉/既可以,如下:
 
<param name="output_frame_id" value="$(arg camera)_depth_frame"/>

 

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