Rtabmap Turtlebot Tutorial Launch Error

Posted by asabet on
URL: http://official-rtab-map-forum.206.s1.nabble.com/Rtabmap-Turtlebot-Tutorial-Launch-Error-tp4800.html

I'm trying to reproduce part 6 of the Rtabmap Turtlebot tutorial , but I get this error at step 2:

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What could be causing this error?