[GRASS-user] DEM export problem

[Zachary Parisa]

Hi all,
I'm trying to export a resampled dem to Gtiff using r.out.gdal ; I
have no problem exporting a slope and aspect file of the same format
and origin, nor do I have any problem exporting landsat images...but
for some reason I when I export the elevation file it reports that it
has completed without error but upon inspection all I have is an
empty,black image that is 1.6mb.
Trying the same thing with the spearfish data (elevation.10m) yields
the same result....except instead of black, the file is green....
my command for example:
"r.out.gdal input=elevation.10m format=GTiff type=Byte
output=/home/zachary/Desktop/dems/test_1.tif"

If I were to simply change the file to any other raster this works fine....

Can anyone help me figure out why I can't export any DEM?

thanks,

Zachary Parisa