Hi all, maybe this might interesting to some of you. After modifying bosch_worlds files available here: https://bosch-ros-pkg.svn.sourceforge.net/svnroot/bosch-ros-pkg/trunk/stacks/bosch_demos/bosch_worlds/ , i was able to run the exploration demonstration available here: http://www.ros.org/wiki/exploration with ROS Diamondback. The patch is attached to my message. Regards, -- Serge Stinckwich UMI UMMISCO 209 (IRD/UPMC), Hanoi, Vietnam Every DSL ends up being Smalltalk http://doesnotunderstand.org/