Bob,
Over the past months, I have been running SN searches, but recently, I've been getting the error as in the log below, with the same error message each time it fails. I can continue by simply restarting the plan, but need to eliminate the route cause. I've pasted in the end of the log.
Running SkyX with Paramount ME, MaximDL, Win 7 x64, direct USB connection between ME and computer running AquireImages script on ACP. Plan is located in documents\Plans. Any suggestions on the cause?
Regards, Dick
05:45:12 (taking 30 sec. exposure, Clear filter, binning = 1)

05:45:12 (using Monochrome readout mode)

05:45:12 (starting exposure)

05:45:47 (can pre-slew to next target)

05:45:47 Start slew to NGC7454...

05:45:51 (exposure complete and image downloaded)

05:45:51 Calibrating image...

05:45:51 Image finished

05:45:53 Plate-solve final image

05:45:53 107 image stars found

05:45:54 72 catalog stars found

05:45:54 Solved! 30 stars matched.

05:45:54 Average residual is 0.24 arcsec.

05:45:54 Pointing error is 0.881 arcmin @ angle 29.45

05:45:54 True focal length is 296.2 cm.

05:45:54 True binned plate scales (arcsec/pix): H = 1.04 V = 1.04
05:45:54 True image center (J2000): 23h 00m 37.4s 12 47' 53.12"

05:45:54 Imager sky position angle is 359.9 deg.

05:45:54 Image FWHM is 2.4 arcsec (2.26 pixels)

05:45:54 (avg FWHM = 2.31 arcsec)

05:45:54 ==== Starting target NGC7454 ====

05:45:54 (wait for slew to complete)

05:45:56 (slew complete)

05:45:58 (no slew, scope already within max error of target)

05:45:58 Ready for NGC7454 (# 191 of 306 in set 1)

05:45:58 **Script Error (Tracking has been stopped)**

05:45:59 Source: ACP Observatory Control Software

05:45:59 Message: at line 1230 column 36.

ACP console log closed 25-Aug-2012 05:46:00 UTC