I've noticed that when I use the advanced compile options in Hammer, that here and there VVIS only runs twice (HDR) only sometimes. I've done this now about 10 times and there is no rhyme or reason to it. Just sometimes VVIS will run twice and sometimes it doesn't. That kinda sucks, especially if you are running the final compile (slow) and it doesn't run twice, then you have to do it again so you have HDR. Why does Hammer do this?