So, I just downloaded and tested The Rosette image you sent. There is incorrect scale information saved in the FITS Header. That is why it fails to solve. The FITS Header says that the scale is 4.9" per pixel, but when I solve the image it says 2.22" per pixel. That is too far off to solve with use scale checked. Unchecking use scale allows this one to solve. I expect this is the first image? The others seem to have correct scale info?

Then I tried the Light 3 image that you sent, The scale was correct in this image and caused no problems, but the position information is very wrong. The position saved in the FITS Header says it is pointing at the pole. If you notice, the DEC is just about 90 degrees. Unchecking use position allows this one to solve. Usually the reason this would occur is if the mount and KStars thinks it is still pointing at the pole when you are really pointing someplace else. If you restarted KStars or your mount, and had the option in KStars set to send the incorrect position information to the other one, or something like that, and then tried to plate solve while pointing at someplace other than the pole would cause this to happen. I hope this made sense?

I'm not sure I understand the "Light 1" Images. They have the wrong position information saved in the FITS Header, and unchecking the "use position" option allows them to solve, but I am not as certain about what happened to cause it as I am in the "light 3" image. Do you have more information about these 2 images? The first one the RA was off a bit. For the second, both the RA and DEC were off. But each image it is a different amount they are off. Did you move the telescope without using the hand paddle or KStars? Or maybe were these done after restarting everything and trying again?

The horsehead image has correct scale and correct position information. It solves right away.

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