Error [RTShaderSystem.cc:408] Unable to find shader lib.
When I run gazebo, prompt the error:
Error [RTShaderSystem.cc:408] Unable to find shader lib.Shader generating will fail.terminate called after throwing an instance of 'Ogre::ItemIdentityException' what(): OGRE EXCEPTION(5:ItemIdentityException): Cannot locate material called 'Gazebo/shadow_caster' in SceneManager::setShadowTextureCasterMaterial at /home/dabing64ub/programfiles/ogre_src_v1-7-4/OgreMain/src/OgreSceneManager.cpp (line 5833)
I compile gazebo from source.thanks~
OS: ubuntu 12.04.4 64bit
Graphics card:GetForce GTX 660