The FTP site link no longer works and and link at esri (http://resources.arcgis.com/content/hydro-data-model) for ArcHydro for 9.2/9.3 doesn't work. I've been trying to find archydro for 9.3 now for about an hour-should it be this hard? Thanks, Stephanie Strange, the link that jvondracek indicated works for me (http://resources.arcgis.com/content/hydro-data-model). However, having downloaded and "installed" it, I keep getting messages saying "5, Invalid procedure call or argument" I installed it fine on another machine. Would this have anything to do with the OS being 64 bit? Garth
... View more