Hi Stash,

Thanks very much for the detailed reply! I am currently using it in stand alone mode and have already done what you suggest, except my search angle was only 20 degrees. I've changed it to 180 but it didn't help with this particular frame.

The "calibrate prior solving" generates a warning about flat █ █ █ █ █ █ Warning, could not find a suitable flat for ""! De-classify flat filter or add correct flat. █ █ █ █ █ █ . I did try adding a flat manually and doing a simple stack of that plus an image, but that generated an actual error (something to do with Simple empty???).

Over the course of the afternoon, I've been trying with a variety of images and have been surprised at times. A couple of shots from my QHY cam (which is pretty noisy for what I was doing) solved. A couple more didn't. No shots of M16, whether from the QHY, my Nikon, or my wife's Canon, solved.

Unfortunately, it is cloudy now and predicted all through the night. Rain tomorrow. Clear skies supposedly on Saturday night - we'll see.

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