The last few times I’ve had a failure, it was due to temporarily losing the guide star. My old acquisition software used to ignore the PHD status and just keep imaging. At worst, I’d have a bunch of bad frames, but sometimes it would find the star shortly after losing it and I’d only have one bad frame.
SGP seems to abort the acquisition routine if PHD doesn’t have a star. Would there be a way to let SGP and PHD keep running hoping for the best? I think that would’ve saved me a few nights of lost data. It’s suslally a matter of some clouds coming in at the wrong time. But the clouds may disappear.