[ros-users] error massage with rospack

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
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