I'm new to GIS - more so in GRASS GIS. I installed GRASS GIS 6.4.3svn in my Windows 7 machine. No problem in installation.

 - Downloaded SRTM-Geotiff file
 - Location, Mapset all o.k
 - Used *r.in.gdal* to import SRTM file
 - Filled the sinks using *r.terraflow*
 - *Masked* the filled raster
 - Zoomed the required region & set the computational region
 - Ran *r.watershed* using *threshold=10000*
 - Got drainge, basin, stream & visual rasters
 - Visual rendering of rasters (drainge, basin, stream & visual) - o.k
 - Different Watersheds (basins) displayed for entire area
 - Zoomed stream raster to find lat/lon of mouth of river (cross checked with Google earth)
 - Converted the lat/lon as decimal
 - Ran *r.water.outlet* using *stream* as input & gave the lat/lon as easting & northing
 - **Sadly the output display is blank**
 - Rerun *r.water.outlet* - only a small dot in the lat/lon point. No delineation of watershed for the given easting & northing
 - All the above procedures as per manuals
 - Self learning of GRASS GIS - no formal training


How do I get the watershed (basin) for the given lat/lon?