Box turtle uses stage 3.0 but u have stage 3.2.2 . so maybe there is some
minor syntax changes. try adding an extra parameter to pose in the .world
file as the error suggests. 
i tried pose [21 19 0] in the willow.world file and no error. i tried
increasing the parameters to 4 like pose [21 19 90 0] and still no error(the
robot was rotated by 90 degrees). infact i tried more than 5 parameters and
less than 3 parameters but yet there were no error.
u can try out this tutorial and reply if it works 
http://www.ros.org/wiki/simulator_stage/Tutorials/SimulatingOneRobot
SimulatingOneRobot 
  
nitinDhiman wrote:
> 
> I tried same tutorial on Cturtle. I got following error:
> 
> 
> /ros-tutorials/ros_tutorials/awesomeros$
> /opt/ros/cturtle/stacks/simulator_stage/stage/bin/stageros
> world/willow.world 
>  [Loading world/willow.world]
> err: Loading pose. Need a vector of length 4: found 3.
> 
> (/opt/ros/cturtle/stacks/simulator_stage/stage/build/Stage-3.2.2-Source/libstage/model.cc
> Load)
> 
> 
> I donot have knowledge about Stage. Anyone tried it on Cturtle?
> thanks
> nitin
> 

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