The full log is at https://www.dropbox.com/s/ghus1kgv02yaorm/sg_logfile_20160719001759.txt?dl=0
The sgf file is at https://www.dropbox.com/s/3zv59m8mtuygksl/M27%20%28NGC6853%29%20-%20Dumbbell%20Nebula.sgf?dl=0
Ignore the 1st meridian flip, that was done by hand the prior night
Then if you just search for "Meridian Flip", you will see the hour angles roll past as it does 10m subs
-58.089
-55.4979583333333
-52.9093333333334
-50.3202083333334
-47.7279583333333
-44.4374583333333
-41.8465
-39.255375
then bang -- out of the blue (and about 10 min past the one above)
59.916375
that caused SGP to request a flip, which the mount refused given that the actual HA was still something like -37.5
I do note an autofocus run had just completed
Thanks for looking at this for me
Staying up to babysit meridian flips is no fun!