[GRASS5] nviz segfault with grass5.7.0

[Hamish]

> i have a problem with nviz, if i try to visualize a rasterfile i get a
> segmentationfault:
> 
> Loading Data
> child killed: segmentation violation

[rest is Tcl cruft]

>     while executing
> "exec /usr/local/grass-5.7.0/etc/nviz2.2/NVWISH2.2 -f
> /usr/local/grass-5.7.0/etc
> /nviz2.2/scripts/nviz2.2_script -q -name NVIZ >&@stdout"
>     ("eval" body line 1)
>     invoked from within
> "eval exec $env(GISBASE)/etc/nviz2.2/NVWISH2.2 -f
> $env(GISBASE)/etc/nviz2.2/scri
> pts/nviz2.2_script $argv -name NVIZ >&@stdout"
>     invoked from within
> "if {$argv == ""} {
> #no arguments
> eval exec $env(GISBASE)/etc/nviz2.2/NVWISH2.2 -f
> $env(GISBASE)/etc/nviz2.2/scrip
> ts/nviz2.2_script -name NVIZ >&@stdo..."
>     (file "/usr/local/grass-5.7.0/bin/nviz" line 16)
> 
> The problem shows up only with rasterfiles.
> I think the reason is, that i running a 64Bit
> Linux on AMD 3000+ 64Bit. Do you have any hints to solve the problem?

some things to try first:

Set the region to include data?
g.region rast=rastermap

Is the map's range != 0?
r.info -r rastermap



> I'm a skilled C-programmer, maybe i can help you?

Debugging NVIZ hints from Glynn
   http://article.gmane.org/gmane.comp.gis.grass.devel/2010


> > AFAICT from the error message, it's the core NVIZ process which
> > crashed; i.e. not the "nviz" script, but the NVWISH2.2 binary
> > interpreting nviz2.2_script. To debug that, you would need to emulate
> > the "nviz" script by setting up the various environment variables,
> > then running NVWISH2.2 under gdb, e.g.:
> > 
> > 	export GISDBASE=`g.gisenv get=GISDBASE`
> > 	export LOCATION_NAME=`g.gisenv get=LOCATION_NAME`
> > 	export MAPSET=`g.gisenv get=MAPSET`
> > 	gdb /usr/local/grass5/etc/nviz2.2/NVWISH2.2
> > 	> run -f /usr/local/grass5/etc/nviz2.2/scripts/nviz2.2_script
> > 	> -name NVIZ



good luck,
Hamish