Hey, You should probably check your permissions for the .ros folder? (ls -l ~/.ros) and modify them if you don't have write access or if you don't own the folder. Cheers, Ugo On 02/09/10 14:04, yimeiliao wrote: > hallo, > > i just installed ros on my ubuntu 10.04 netbook version. when i tried > "rospack find roscpp" i got an error message > > [rospack] Unable to create temporary cache file > /home/waxwings/.ros/.rospack_cache.jmdWZ9: Permission denied > /home/waxwings/ros/ros/core/roscpp > > is this a problem? > > Regards > yimei -- Ugo Cupcic | Shadow Robot Company | ugo@shadowrobot.com Software Engineer | 251 Liverpool Road | need a Hand? | London N1 1LX | +44 20 7700 2487 http://www.shadowrobot.com/hand/ @shadowrobot