On Tue, Dec 20, 2011 at 7:13 PM, leonidas <leonidas_liakos at yahoo.gr> wrote: > I'm using Ubuntu 11.10 and GRASS 6.4.1 installed from synaptic manager. Sidenote: Only from GRASS 6.4.2 the g.extension module will work more reliably on Ubuntu and other distros... Markus