I have a model that has been crashing a lot but I can't track down why. One time it could happen after changing a fan schedule by an hour, another time by adding baseboard capacities (or even changing capacities - 1,000 works, 2,000 crashes), or adding OA CFM to a zone (but adding OA/Person works fine provided its 18 not 16), or about a dozen other changes that I've noticed. Typically it crashes around 18% or 34% simulation progress. No errors show up in the sim file or elsewhere but it does create a large (66,888 kb) file called "FOR003" that is unreadable. Any thoughts? Has anyone run into this before?

Thanks,

Matt Dubrovich, P.E.