Well, I did a complete reinstall of Astroberry (3rd or 4th time since I started playing with the RPi) and things are looking better. Perhaps the problem was that I may have missed the the 'Presets' dropdown menu under GPhoto CCD/Main Control and had it set to something other than bulb--frankly, I don't think I had even noticed that dropdown box before!!! I know I had set the camera itself to 'bulb' and must have assumed that was sufficient.
I still need to figure some other things out since Ekos/Indi control panel seem to crash on occasion --too early to put a handle on what's happening, although it may be related to settings related to viewing the downloaded image. I'll have to play some more . Anyway, I do feel like I'm making progress.

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