Hi, I have some problems with gazebo and rviz. When I launch gazebo I have this error that makes gazebo terminate:

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] Qt has caught an exception thrown from an event handler. Throwing exceptions from an event handler is not supported in Qt. You must reimplement QApplication::notify() and catch all exceptions there.

terminate called after throwing an instance of 'Ogre::InternalErrorException' what(): OGRE EXCEPTION(7:InternalErrorException): Error decoding image in FreeImageCodec::decode at /build/buildd/ogre-1.8-1.8.1+dfsg/OgreMain/src/OgreFreeImageCodec.cpp (line 420)

When I launch rviz I have:

[ INFO] [1481312659.159446069]: rviz version 1.11.15 [ INFO] [1481312659.159522240]: compiled against Qt version 4.8.6 [ INFO] [1481312659.159539034]: compiled against OGRE version 1.8.1 (Byatis) [ INFO] [1481312659.453989745]: Stereo is NOT SUPPORTED [ INFO] [1481312659.454241007]: OpenGl version: 3 (GLSL 1.3). [ERROR] [1481312659.830250521]: Could not load pixmap '/opt/ros/indigo/share/rviz/icons/rotate.svg' [ERROR] [1481312659.830319651]: Could not load pixmap 'package://rviz/icons/rotate.svg' -- using default cursor instead. [ERROR] [1481312659.840384428]: Could not load pixmap '/opt/ros/indigo/share/rviz/icons/rotatecam.svg' [ERROR] [1481312659.840443170]: Could not load pixmap 'package://rviz/icons/rotatecam.svg' -- using default cursor instead. [ERROR] [1481312659.857979965]: Could not load pixmap '/opt/ros/indigo/share/rviz/icons/move2d.svg' [ERROR] [1481312659.858050447]: Could not load pixmap 'package://rviz/icons/move2d.svg' -- using default cursor instead. [ERROR] [1481312659.884140047]: Could not load pixmap '/opt/ros/indigo/share/rviz/icons/movez.svg' [ERROR] [1481312659.884309125]: Could not load pixmap 'package://rviz/icons/movez.svg' -- using default cursor instead. [ERROR] [1481312659.884843991]: Could not load pixmap '/opt/ros/indigo/share/rviz/icons/zoom.svg' [ERROR] [1481312659.884881259]: Could not load pixmap 'package://rviz/icons/zoom.svg' -- using default cursor instead. [ERROR] [1481312659.885307763]: Could not load pixmap '/opt/ros/indigo/share/rviz/icons/crosshair.svg' [ERROR] [1481312659.885345322]: Could not load pixmap 'package://rviz/icons/crosshair.svg' -- using default cursor instead. [ERROR] [1481312659.912207683]: Could not load pixmap '/opt/ros/indigo/share/rviz/icons/cursor.svg' [ERROR] [1481312659.952706665]: Could not load pixmap '/opt/ros/indigo/share/rviz/icons/classes/FocusCamera.svg' [ERROR] [1481312659.958527961]: Could not load pixmap 'package://rviz/icons/crosshair.svg' -- using default cursor instead. [ERROR] [1481312659.959363327]: Could not load pixmap '/opt/ros/indigo/share/rviz/icons/classes/Measure.svg' [ERROR] [1481312659.959702246]: Could not load pixmap 'package://rviz/icons/crosshair.svg' -- using default cursor instead. [ERROR] [1481312659.965210387]: Could not load pixmap '/opt/ros/indigo/share/rviz/icons/classes/PublishPoint.svg' [ERROR] [1481312659.965800252]: Could not load pixmap 'package://rviz/icons/rotate.svg' -- using default cursor instead. [ERROR] [1481312659.965852024]: Could not load pixmap 'package://rviz/icons/rotatecam.svg' -- using default cursor instead. [ERROR] [1481312659.965889812]: Could not load pixmap 'package://rviz/icons/move2d.svg' -- using default cursor instead. [ERROR] [1481312659.965926134]: Could not load pixmap 'package://rviz/icons/movez.svg' -- using default cursor instead. [ERROR] [1481312659.965963218]: Could not load pixmap 'package://rviz/icons/zoom.svg' -- using default cursor instead. [ERROR] [1481312659.966000829]: Could not load pixmap 'package://rviz/icons/crosshair.svg' -- using default cursor instead. [ERROR] [1481312659.988933818]: Could not load pixmap '/opt/ros/indigo/share/rviz/icons/classes/Displays.svg' [ERROR] [1481312659.996495886]: Could not load pixmap '/opt/ros/indigo/share/rviz/icons/classes/Views.svg' [ERROR] [1481312660.046416149]: Could not load pixmap '/opt/ros/indigo/share/rviz/icons/classes/Time.svg'

Can anyone help me? What is the problem?

Thank you