Hi Reza, you just have add a copy of that package to your home directory (e.g. ~/ros) and make sure that your ROS_PACKAGE_PATH first includes the ~/ros directory and afterwards the release directory. It should look similar to this ROS_PACKAGE_PATH=~/ros:/opt/ros/diamondback/stacks Regards, Florian ________________________________ Von: ros-users-bounces@code.ros.org [mailto:ros-users-bounces@code.ros.org] Im Auftrag von Asghari Oskoei, Mohammadreza Gesendet: Mittwoch, 16. Februar 2011 18:59 An: User discussions Betreff: [ros-users] new package Hi, I'm using pre-compiled DB, occasionally had to download (from unstable), modify and compile a fresh version of image_geometry (stereo_camera_model.cpp), I wonder how I can swap the old version with this new one. I prefer to keep working with standard pre-compiled DB and just replace this package with new one. Regards, Reza,