Shutter doesn't stay closed for dark or bias frames using SGP

[cmassa]

Recently, I've needed to make some new dark frames. I use SGP for imaging and it has always worked before. Now when I set it to take a bias or dark, it opens the camera shutter and I get an image of stars. I turned on logging in the driver and I believe these are the lines pertinent to the problem:

21:45:25.747 StartExposure             Duration 10, Light False
21:45:25.747 StartExposure:            bin 1,1: subframe 0,0:3354,2529: high priority False, amplifier switched-True, set dark mode TrueStartExposure, started

I've also attached the full log file. This is just a connect, take a bias frame of 10s, and then disconnect.

I am using the newest version of the software dated July 28 (same problem with next previous version as well) and the newest version of SGP. Camera is a 383L+ mono.

Any ideas?

Thanks,
Chris

[ChrisGolden]

Hi Chris,

Sorry to hear you're having problems. I've been trying this myself this morning and haven't been able to recreate it. I released a new version of the core installer last week. Could you install that, making sure the ASCOM checkboxes are ticked. If that doesn't resolve the issue, I can send some debug code to help get to the bottom of it.

Chris.

[cmassa]

I'm already using the version of the software from last week.

Thanks,
Chris

[ChrisGolden]

Hi Chris,

Sorry for the slow reply. I've been looking at this problem again this afternoon and think I've fixed the issue! Could you try the following version:

https://www.dropbox.com/sh/4zvnoy3uvmxd9kn/AABUiFmFFVHDiOs19k9xLU5Ea?dl=0

I'm uploading it to dropbox now. It should be there within 20mins or so. If you don't have a dropbox account, you can get one for free. If this is a problem, let me know and we can try and work something else out.

Let me know how it goes.

Chris

[cmassa]

I'll try it this evening and let you know.

Thanks,
Chris

[cmassa]

So far so good! The shutter stayed closed for 2 short dark frames as a test. I'll add some dark frames to run in the morning after tonight's imaging and make sure.

Thanks for the help,
Chris

[ChrisGolden]

Hi Chris,

That's great! I found that the problem only occurred with longer exposures (and that's how I missed it the first time). We actually time the exposures slightly differently if they are longer/shorter, and the longer exposures wasn't closing the shutter properly. The cut off is around 2.4 seconds.

Let me know if you have any more problems.

Chris.

[cmassa]

I'll try some short bias frames later to make sure those work too.

Chris

[cmassa]

I've done some dark frames and a few bias frames and all seems good now.

Thanks for the help,
Chris