[GRASS-user] Problem with v.rast.stats

[António M . Rodrigues]

Hi,

when using v.rast.stats to get stats for a raster over a polygon layer, I get the following error:

-----
DBMI-DBF driver error:
Error while executing: 'ALTER TABLE caop09c2 ADD COLUMN  a2_per0-10 DOUBLE PRECISION
'

Cannot continue (problem adding column).

SQL parser error: syntax error, unexpected '-' processing '-'
in statement:
ALTER TABLE caop09c2 ADD COLUMN  a2_per0-10 DOUBLE PRECISION
Error in db_execute_immediate()
Cannot continue (problem adding columns).
-----

This only happens when I choose the extended statistics option. If not, it works fine. Actually, GRASS 
adds all the new fields but does not calculate the quantiles.

An extra question: is it possible to get more quantiles than those calculated using the default (1st, 
median and 3rd)?

Thanks,
António