[ros-users] error massage with rospack

[Cedric Pradalier]

On 09/02/10 17:17, Brian Gerkey wrote:
> If you don't fix the permissions as Ugo suggests, rospack will still
> work correctly, but it will be slower than it could be, because it
> can't cache package locations.  Depending on the size and nature of
> your ROS installation, it can be important to enable caching, because
> rospack is used to look up package locations very frequently,
> including at run time.
>
> 	brian.
>
>    

Hi,

That actually raises a question: what is the recommended procedure on a 
read-only system. Is it better to put the cache on a tmpfs mount or is 
it possible to generate the cache once and for all, and use it afterward?

Thanks




> On Thu, Sep 2, 2010 at 7:56 AM, Ugo Cupcic<ugo at shadowrobot.com>  wrote:
>    
>>   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 at shadowrobot.com
>> Software Engineer  |    251 Liverpool Road |
>> need a Hand?       |    London  N1 1LX     | +44 20 7700 2487
>> http://www.shadowrobot.com/hand/              @shadowrobot
>>
>> _______________________________________________
>> ros-users mailing list
>> ros-users at code.ros.org
>> https://code.ros.org/mailman/listinfo/ros-users
>>
>>      
> _______________________________________________
> ros-users mailing list
> ros-users at code.ros.org
> https://code.ros.org/mailman/listinfo/ros-users
>    


-- 
Dr. Cedric Pradalier
http://www.asl.ethz.ch/people/cedricp