Getting exposure time into project

[theskyhound]

Roy, I'm glad the change seems to have helped, but I'd still like to understand what was happening. I wasn't able to reproduce nonstandard behavior with a single exposure time, and I'm not sure why that would lead to zero exposure times--so I don't think that's the whole story. My concern is making sure the underlying cause is identified so others don't run into the same thing. That's why I was asking about your configuration to begin with. I will keep testing. I may not need any more from you at this point.