Hello! I'm new to ROS. I installed turtlebot simulator and can use it. When i run "roslaunch turtlebotgazebo turtlebotworld.launch" I get these errors, but it works anyway:

Error [Param.cc:181] Unable to set value [1,0471975511965976] for key[horizontal_fov] Error [Param.cc:181] Unable to set value [0,100000001] for key[near] Error [SDF.cc:788] Missing element description for [pointCloudCutoffMax]

I tried to get informations about topic registereddepth/imageraw and I saw that it's not implemented. So i'm trying to use the nodelet "depthimageproc/register" to get "depthregistered/imagerect", but it returns nothing. I saw also that under the topic: "/camera/depth/camerainfo" there is nothing and that the topic: "/camera/depth/imagerect" doesn't exists.

This is how i modified the file "turtlebot_world.launch"

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<!-- create, roomba --> <!-- /proc/acpi/battery/BAT0 --> <!-- circles, hexagons --> <!-- kinect, asusxtionpro -->

<!-- Fake laser -->

<!-- Include nodelet depthimageproc of imagepipeline --> <node pkg="nodelet" type="nodelet" name="depthregisteredimagenodeletmanager" args="manager" /> <node pkg="nodelet" type="nodelet" name="depthimageproc" args="load depthimageproc/register depthregisteredimagenodeletmanager --no-bond"> <remap from="depthregistered/imagerect" to="camera/depthregistered/image_raw" />

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Thanks in advance to anyone can help me!!