Can't import mesh using roslaunch and gazebo

I just created a simple world using Blender 2.7.2. I exported the file to .dae (collada) and successfully imported it running: gazebo test.world test.world is detailed like this: model://ground_planemodel://sun0 0 0 0 0 0true0 0 0.1 0 0 0file://piso_madera.dae I have placed the file piso_madera.dae and the .jpg file that it uses for the ground texture in the same directory as test.world. The path is within the ros package `cvg_sim_gazebo` in a folder named `worlds`. The directory tree is like this: cvg_sim_gazebo\ worlds\ test.world piso_madera.dae woodsample.jpg launch\ testworld.launch As I mentioned before Gazebo is able to import the file and the texture. When I try to use a `roslaunch` file I get the following error: Error [SystemPaths.cc:367] File or path does not exist[""] Error [Visual.cc:2133] No mesh specified My launch file is: I want to be able to store all my files in this directory and not have to move them to the Gazebo directory. I am using ROS Indigo, Gazebo 2.2 and Ubuntu 14.03.