[GRASS-user] Unable to start Grass with North Carolina dataset

[Markus Neteler]

On Mon, Dec 16, 2013 at 4:15 AM, Tahir Tamba <tahir.tamba at gmail.com> wrote:
> Hi,
>
> I'm getting an error messsge when I'm trying to use the North carolina
> datatset which has been decompressed into the grassdata directory which
> holds the nc_spm_08 dataset. All the permissions have been granted to that
> directory, but when I select my mapset within Grass data management system i
> 've got the following error message:
>
>> Starting GRASS ...
>> /home/ttamba/grassdata/nc_spm_08/landsat/.gislock: Permission denied
>> ERREUR :/usr/lib/grass64/etc/lock:
>> Unable to properly access
>> /home/ttamba/grassdata/nc_spm_08/landsat/.gislock
>> Please notify system personel.
>
>
> I'm using Ubuntu 13.10 saucy.
>
> Does anybody know how to solve this issue?

Please check the file
/home/ttamba/grassdata/nc_spm_08/landsat/.gislock
for ownership and date.

Since it is in your home and not a network directory, this happens if
you try to open more than one GRASS GIS sessions in the same *mapset*.
You can work in the same location with more sessions (also run by
other users) but not in the same mapset.
See also here:
http://grasswiki.osgeo.org/wiki/Location_and_Mapsets

If it is a leftover outdated file and no GRASS session is running
therein, then you can simply remove it.

Note that recent GRASS versions open a related dialog.

Markus