Hi,
I've been having an issue with ArcHydro models for some time now, and finally have some time to look into it. The model i'm working with gives me what I want, but it keeps deleting some of the output after it runs, or after the mxd is saved and reopened. This happens to only a few of the outputs, but happens every time usually to the same ones, which are both raster and vector. They are behaving as though they are set to Intermediate, but that is definitely not the case and I also make sure to add them to the display and save the mxd. Fortunately, this does not happen to the ultimate outputs which I need, like fdr (flowdirection) but it makes it very difficult and frustrating to go back and troubleshoot or tweak the model since I lose several steps along the way. I don't have the time to go piece by piece, running the model, and figuring out what happens at every step along the way, so I'm hoping someone has encountered this before or has any thoughts. Below is a screen shot of the model, with the steps numbered in order. The outputs which have a tendency to vanish after the model completes are PreFillDEM, SinkPoly, and fil...where do they go and why?!?