Pretty serious error last night. I was imaging Sh2-174, near Polaris, so started on the W side of the meridian pointing N. Fortunately I stayed up until tracking crossed the meridian because SGP failed to detect the need for a flip. Not sure what happened there - I was doing long exposures (30min) so tracking was 10-12min on the E side of the meridian and the Astro-Physics V2 driver window was displaying CW Up. However the frame finished and SGP just continued onto the next frame without flipping. Very worrisome behavior as I often just go to bed and assume all will be well. Only thing I can think of is that I believe the AP driver doesn’t allow access your usual command (?SideOfPier?) and so it has to use the slew command which then detects that a meridian flip is needed. Could that failsafe method have been disabled somehow?
EDIT: I should have mentioned that I immediately paused the frame and ran the meridian flip manually and it worked perfectly, so the problem was in SGP not triggering the flip, not a problem with the mechanics of doing the meridian flip.
Anyway I can’t trust SGP to flip until I figure out why it missed the trigger. I’d post my logfile, but I’m not sure how to do that now???