Hi Chris,
I suppose it is bug in FM. I have the same error in FM v4.1.0.11 with my FLI Atlas. Steve has changed some in a new version 4.1.0.12, but i haven't tested yet. I 'm using the latest 3 version 3.8.0.8 and don't have this error.
My logs:
FM log:
03:11:01 Moving to focus position: 74300
03:11:18 Taking images at focus position
03:11:23 Max pixel: 26355 Count: 1
03:11:28 74300, 03.36, 74300, 2082, 2018, 284454, 29918, 1, FWHM: 2.34
03:11:33 74300, 03.76, 74300, 2081, 2018, 279023, 20225, 1, FWHM: 2.86
03:11:38 74300, 03.70, 74300, 2082, 2018, 284842, 24400, 1, FWHM: 2.62
03:11:38 Position = 74300 Avg HFD = 3.61 Avg FWHM = 2.61
03:11:38 Temp = 8.0 Filter = Luminance (slot 0)
03:11:38 AutoFocus Completed
03:11:38 Focus time: 140 sec
03:45:43 FLI.Focuser.1 Error -2147352567:
03:45:43 Could not connect to focuser flifoc0
04:01:53 FLI.Focuser.1 Error -2147352567:
04:01:53 Could not connect to focuser flifoc0
ACP log:
00:45:34 (waiting for guider to settle...)
00:45:39 [flip check: Tn=900s HAc=3509s GW=T HAz=4408s DWz=T WF=no]
00:45:39 Imaging to NGC1579-BRG-Green-bin2-900sec-W-temp_-30C-20141103@004539
00:45:39 Switching from Red to Green filter for imaging
00:45:39 Focus change of -1128 steps required
00:45:43 Focuser link failed
00:45:44 (stopping the autoguider)
01:01:24 Start slew to AutoFocus...
01:01:43 (wait for slew to complete)
01:01:53 (slew complete)
01:01:53 Updating pointing...
01:01:53 Switching from Red to Luminance filter for pointing exposure
01:01:53 Focus change of -640 steps required
01:01:53 **Script Error (Tracking has been stopped)**
01:01:53 Source: FocusMax
01:01:53 Message: Focuser link failed
01:01:53 Location: line 941 column 13.