Thanks Xplode, Ross and Han.
But . . . .
As suggested, I just tried solving without being connected. But all my images are binned 1x1! During a session, all plate solves are done at 3x3.
Here’s what happens when I attempt to solve a FITS sub taken on a previous session. . .
1/ Open the unbinned fits in SGP.
2/ Solve with my usual PS2 settings, i.e. binned 3X3 and “max regions:” PS2 goes off on a wild goose chase and fails. Keep in mind PS2 works fine with these settings when actually imaging. Has for years! But it won’t solve an unbinned image loaded into SGP?
3/ Same unbinned fits file, same settings, i.e., binned 3x3 and “max regions.” ASTAP solves all but instantly. But it would not work with these settings when actually acquiring a binned image during a session.
It occurs to me that the difference is that the FITS I am trying to solve is NOT a binned image! My plate solve images are binned but my “real” subs are unbinned.
Camera is an STL, 4008x2672 px.
So, I remain puzzled.
ASTAP will not solve at 3x3 binning when acquiring binned images during a session. But it solves unbinned subs taken during that session all but instantly.
PS2 solves during a session during a “slew and center” operation but fails when used on an unbinned sub acquired during that session? It fails irregardless of the binning setting. Changing to 1x1 has no effect. Of course the actual image is 1x1.
I have no 3x3 binned images on disk to experiment with as I only bin for reasons of focusing and plate solving and none of those images are retained.
So, back to having to wait for another imaging session and trying ASTAP at other than 3x3. If I have to shoot unbinned, I may well have to increase exposure time on plate solve images and thereby lose any speed advantage ASTAP may have over PS2.