Hi, I'm a new Arc Hydro user (on Windows 7 64-bit and Arc10), and also getting these errors. I've tried clearing the temp. directory, etc, as directed by others, but it doesn't seem to be making any difference. I've also noted that the tools for which I get these errors seems to vary (ie during the tutorial I only had this occur when I reached the 'combine stream links' stage, however with my real (Aster GDEM V2) data this is sometimes occuring with the sink evaluation and depression evaluation tools), so it doesn't appear just to be a licensing issue in my case. I was mainly wondering, does anyone know exactly which tools require ARCINFO to run (I'm running ArcEditor) so I know which errors to persist with trying to solve and which are license based? Thanks, Paul
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