Hi Linda,
Thank you for both replies. Could you possibly elaborate on the
view factor calculations making E+ crash?
It started out with a complex building showing odd, negative
values at nights. See attached for one of the zones. As you
can see, it has no floor, it has not "opposite" surfaces so the
view factors ended up being the cause of the negative numbers.
We changed some of the criteria for accepting the "fixed" view
factors. (modified after the original approximate view
factors). And sometimes actually using the approximate though they
don't work for all cases.