TheSky X autodark issue suspected

I use SkyX Pro by Software Bisque to operate my 16 year old SBIG 1001E camera. I use CCDStack2 to process the images, including the creation of color images. Lately my color images are coming out looking like the attached image. My clear B&W images are fine. Anyone have any ideas?
Thank you, Jim

 

I believe these to be raw images taken through all four filters individually. I am not sure I said anything about these raw images.
Jim

 

Hello Doug
I am new to this forum and recently asked to use it rather than communicating through email with Colin.
So the back story is that I was getting black round spots in a pattern offset from the brightest stars. (image below taken with blue filter) This was most noticeable with color filter images but probably on the luminance as well. Colin suggested it might be a problem with AutoDark, so I took colored filtered images without AutoDark. These showed no dark spots, but produced the bad color images I sent to you.
Thank you for your patience.
Jim

 

Colin and Doug
Bill and I did repair ( actually recalibrated and relocated) the shutter and it is working properly now, after adjustment, according to Bill. There are no more images with the shutter showing. However, if I use auto-dark with a filter, especially colored ones, I get the black star dots.
I will take a few dark field exposures and see if anything appears. If stars show up, and I read you right, you're saying this is likely a Software Bisque problem in their SkyX Pro camera add-on which is what controls the camera. I can almost hear their reaction, but I will try. I hope I don't end up in a Bob Dylan song:" back in the middle with you"!
Got a few days of clouds, so it may be a while.
Jim

 

I did six dark images; first three with luminance; one each red, green blue. All 180 seconds at -15C.
Jim

 

OPPS, not Bob Dylan but two guys from Scotland who are stuck in the middle with you!

 

Hi Colin
I understand that completely, but the issue remains of dark spots offsetting star images, most notable on images taken with colored filters. You all suggested there was something wrong with auto dark, so I decided to check to see if anything showed up taking a dark....nothing as expected. So what is causing the dark spots? If it's not auto dark and it's not the shutter, what is it?
Jim

 

And if the shutter is not closing during auto dark, then I should just see another un-calibrated image.

 

Will respond but we have a storm coming in now so it won't be for a couple of days. Hopefully the fixed shutter, thanks to Bill. will eliminate the black spot problem as well. The images I sent to Doug where without dark calibration which showed no spots but were terrible images as he rightly noted.
The six images I took as darks are all stored as .fit images. Since they are darks at a certain exposure and temperature, I created a new calibration library folder but I have no intension of ever stacking them. I may use them to do calibration if I can't use auto dark.

 

Hi Colin
I took images last night despite bright moon and high humidity. Every image was without the offset black spots except images taken through a HII filter. Attached are a two good (luminance and green) and the one bad (HII). None of the images has been run through any manipulating software. I must say I was congratulating you most heartily until this last HII image showed up. Any thoughts?
Jim

 

Yes, my bad. HII is Ha. I would normally never use on this object, mostly used on nebulae with SII and OIII. I just selected several filters to see if the black spots showed up. They did on this particular image. I am able to make them disappear with some processing. Maybe it's not an issue but would love to know what's causing them. That image was exposed 3 minutes.