[GRASS-user] Problem with i.cluster in Grass 7

[Ned Horning]

Hi -

I'm trying to do an unsupervised classification using GRASS 7 compiled 
today from SVN on my Ubuntu 64-bit machine. When I run i.cluster from 
the GUI it completes instantly and creates an empty (except for the 
line: #produced by i.cluster) signature file. Below is the output from 
the Command output window.

--
i.cluster group=TM_r15c33 at PERMANENT subgroup=AllBands 
signaturefile=TM_r15c33_Isodata classes=15 convergence=99.9 min_size=10000
Reading raster maps...
i.cluster complete. File <TM_r15c33_Isodata> created.
(Mon Nov 22 16:12:53 2010) Command finished (0 sec)
--

When I list the bands in the group and subgroup is looks okay to me:
--
i.group -l -g group=TM_r15c33 at PERMANENT subgroup=AllBands
TM_r15c33.1 at PERMANENT
TM_r15c33.2 at PERMANENT
TM_r15c33.3 at PERMANENT
TM_r15c33.4 at PERMANENT
TM_r15c33.5 at PERMANENT
TM_r15c33.6 at PERMANENT
TM_r15c33.7 at PERMANENT
i.group complete.
--

Any idea what the problem is? Is anyone else having trouble with 
i.cluster in GRASS 7?

Ned