Referencing models from other packages

Hi guys, is it possible to distribute world models (incl. dae-files) and vehicle models in different packages? I've got the following package structure using Gazebo 2.2.3: > ` catkin_ws/src/model_package` contains the *.world files including references to the respective *.dae files> ` catkin_ws/src/robot_package` contains the robot description as well as the respective controller,ros plugins and launch files When i try to reference the world file of the model_package in the launch file of the robot in the robot_package via i obtain the error> Error [SystemPaths.cc:367] File or path does not exist[""]> Error [MeshShape.cc:64] No mesh specified I assume, that the linked mesh cannot be loaded. The mesh itself is referenced like file://Road.dae The world can be loaded from any launch file inside the model package. I just checked the GAZEBO_RESOURCE_PATH and GAZEBO_MODEL_PATH. The variables are set correctly to the directory, where both the world file and the dae-file are placed. Any suggestions? Best regards,