Unable to Read Image File Again

I’m having the same problem described in this post;

/forum.sequencegeneratorpro.com/t/platesolve2-gives-an-error-unable-to-read-image-file-unspecified-error/5365https:/

Here’s a link to the Debug Log. Dropbox The PS2 issues start at 21:46.06.303 .

I have read all of the threads about this issue and the one linked above is closest to my own. I am unsure if the root cause is identical, and not sure which solution actually solved the problem that roelnoort was dealing with.

My problem is that I successfully plate solve an image (Determine Reference Frame), slew to the reference frame, but when it comes time to “Validate” the camera captures a 20 second integration, but I get the notification “Unable to read the image file. Unspecified error.” The plate solving process hangs there and eventually fails.

I’m still wrestling with this after a few more nights of plate solving failure. One of my astrophotography mentors has the same imaging train and auto guiding system as I do, though he’s got an Astro Physics mount while I have a Celestron. Since setting up plate solving in SGP many years ago it has always worked for him. So I asked him to send me any old debug log so I could make a comparison with mine. I found very few differences.

In the “Settings Dump” I found that;
He has “settingEnableImageHistory":false.”
I have “settingEnableImageHistory":true.”

He has “settingDefaultMfwFov":1.0,"
I have “settingDefaultMfwFov":1.5,”

He has “settingAstrometryNetEndpointList":[]”
I have “settingAstrometryNetEndpointList":["http://nova.astrometry.net/api"]”

My guess is that the last is significant.

Then I compared the plate solving sequence, starting at “PopulateDataModel: Transferring view to the data model…”. Our plate solve sequences were identical except for RA and Dec, because we were trying to solve different targets, until this point:
His log: C:\Users\him\AppData\Local\SequenceGenerator\PlateSolve2.exe 5.64655230509203,1.00280091902083,0.01781213226263,0.01340997570224,3000,C:\Users\s24ma\AppData\Local\SequenceGenerator\Temp\psXSolve_0.fit
[07/16/20 21:59:57.702][DEBUG][Telescope Thread][CE;] PlateSolve2: read APM file…
[07/16/20 21:59:58.207][DEBUG][Telescope Thread][CE;] PlateSolve2: Exit state -> ValidSolve

My log: C:\Users\MLewi\AppData\Local\SequenceGenerator\PlateSolve2.exe 5.73116458390577,0.82493983843682,0.01838238945842,0.01383929741548,1250,C:\Users\MLewi\AppData\Local\SequenceGenerator\Temp\psXSolve_0.fit
[08/08/20 21:49:24.001][DEBUG][Main Thread][CE;] PopulateDataModel: Transferring view to the data model…

These 2 steps are missing from my log:
[07/16/20 21:59:57.702][DEBUG][Telescope Thread][CE;] PlateSolve2: read APM file…
[07/16/20 21:59:58.207][DEBUG][Telescope Thread][CE;] PlateSolve2: Exit state -> ValidSolve

So I hope these things provide some clues to what I’ve set wrong so that I can get platesolving working again. It’s such a fantastic feature and saves so much valuable dark sky time.