I was not attending EKOS when this happened with the images from 20-25 as given by example, but I have seen the guide totally stop and resume again trying to find a guide star. To be sure, I have attached the log file generated and clipped it only to the events between generation of img020 till img025.
 

Also, to easy asses the guide behavior, I filtered only the guide logs (in the same scope) in a separate log file
 

Thank you. Capture was never aborted. The guide module was trying hard not to fail so it kept waiting for stars to show up. When they did, it ended up picking another star and therefore the whole target was off. At least, that's my theory. I suggested to the devs that in such situation when the scheduler is running, it should elect to stop the whole process and restart alignment/guiding/capturing flow to ensure all is in order.

Thanks @jasem, I think you are right in your theory. Below are my findings that match yours. The question is when we can get this update (when losing guide star go to plate solving and restart guiding)?

 
 

Can I also suggest to add a way to change guide star on the fly, without stop the schedule/plan/guide?

@Mohamed: Thanks for that analysis. I believe you are correct that there is a bug here in the guider, your annotations help, and I have a theory about what is happening. Let me look into it a bit more, and I'll get back.
@Alessandro: I think it is changing guide stars on the fly, but I believe the problem is that it is not communicating that well to the guider. 
In any event, it's best that I look more carefully into it without guessing and get back to you.

Hy

I had added a draft merge request that may fix this.
invent.kde.org/education/kstars/-/merge_requests/507
This is pretty raw, and I can't test until skies clear up. Tomorrow night is possible,
but I'm not sure. Weather has been pretty marginal around here for a while. 

@Mohamed (or others who are also capable): if you want to test, that would be great, but you need to be comfortable with git and compiling KStars.
It is not submitted, so you'd need to get it from my forked repo, doing something like this:

In a new directory, if you are good at getting code off of git repos, and want to test this, then
"git clone  invent.kde.org/murveit/kstars.git "
and go to the guider-fix15 branch (git checkout guider-fix15), and setup compilation using cmake and compile that and run the new KStars binary.
This code is at the current KStars HEAD plus my new changes.
You would just run SEP MultiStar guiding the way you've been doing.
The new code probably won't trigger unless the skies are poor, like the ones you've been testing with.

Hy
 

Thanks for the information keep sharing such informative post keep suggesting such post.

Hy, everyone

Here is your new code from the git yesterday. I'm not sure how I'd test, it but here's the log anyway:
drive.google.com/file/d/1BAUAv4ItJ-mWO0Y...DT-/view?usp=sharing
All goes well until right at the end where indi closed the session. I had to go back to the stable version to finish it but I don't think it's the guider which caused the shutdown...

Oh, and MANY congratulations to whoever smoothed the guiding plot in the guide tab from those dreadful square waves:)

Cheers and happy new 2022 to all

You could test it without clouds by physically covering the guidescope, right?

I recently looked into the original complaint (imaging shifted by the internal guider when clouds rolled in) and in fact found a bug that would cause this shift in some situations. I fixed that issue and it is now in the beta software. See the fix here: invent.kde.org/education/kstars/-/merge_requests/525

I was able to replicate the original issue, and after the fix I imaged with this a couple nights and clouds rolled in a few times, and with the fix the position was maintained. I also put a hat (literally) on the guide-scope for several different intervals, and all was good.

Please let me know if still see issues, and/or if you see improvement with the fix.
Hy
 

Hy,

That's awesome!

When do you think it will be moved to stable?

Ron

Fantastic news! I've also noticed the problems reported in this thread. I am looking forward to testing these fixes. Doesn't look like it will be any time soon, though. Nothing but clouds this time of year.