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How do a fix this enviroment error ?

Turltebot

asked 2017-03-07 14:17:50 -0500

jeff96
11 ●2 ●2 ●4

updated 2017-03-07 14:52:40 -0500

gvdhoorn
86574 ●283 ●1432 ●1054 http://cor.tudelft.nl/

I'm trying to run this command but I get this error :

roslaunch turtlebot_bringup minimal.launch --screen

I get this

Invalid <arg> tag: environment variable 'TURTLEBOT_BASE' is not set. 

Arg xml is <arg default="$(env TURTLEBOT_BASE)" doc="mobile base type [create, roomba]" name="base"/>
The traceback for the exception was written to the log file

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