That was exactly the problem. Sorry for the bother. I was trying to import data in units of feet into a meters location. So, I guess there were about 3x as many rows and cols as should have had. Oh, it's so embarrassing to have problems with region, units, and masks. Thanks for answering though. Eric
----- Eric Hardin -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/v-surf-rst-does-not-get-past-0-from-cli-throws-error-from-python-gui-but-not-tcltk-tp5491018p5495213.html Sent from the Grass - Users mailing list archive at Nabble.com. _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user