I created a simple model to derive Slope, Aspect, and Curvature from a DEM. When I "run the entire model" or use the "run" toggle button..the model begins to run and then ArcGIS crashes. When I open the output file location, I see that slope and aspect were created but curvature was not. I tried to run just the curvature portion of the model and it again crashes. I have used model builder several times in 9.3.1 and I know it can be touchy, so I have learned what to look for...but this is my first time using it in version 10. Suggestions??