[GRASS-user] strange result of v.overlay in 6.4

[Markus Neteler]

Hi Ivan,

On Mon, Jul 4, 2011 at 4:03 PM, ivan marchesini
<ivan.marchesini at gmail.com> wrote:
> Dear Grass users,
> I have verified this strange behaviour:

which GRASS version on which OS?
Latest and greatest stable (i.e. 6.4?)

> I have two layers:
>
> A has 50 areas "grouped" in a single isle
> B has 30 small areas that in part overlap with the boundaries of the A
> isle
>
> I have created a new layer C from A and B:  A not B = C
...

please consider to put a screenshot somewhere. Even better, the
data or a reproducible example.

Markus