Hello, I have been happily using ACP & MaximDL running my robotic observatory since 2011, but recently after upgraded to the newest version ACP and hence MaximDL 6, I found the operation keep hanging, usually stucked during camera exposure.

I don't have such problem using previous version ACP and MaximDL 5, my hardware (camera, focuser, cloud sensor, dome, mount... etc) are all the same, computer are new and stable with Window 7, no other softwares installed and just observatory automation.

Can you help advice how I can fix this problem? Most of the day I wake up and found the observatory is stucked there, rarely it finish whole night's observatory by dawn.

I copy the last few rows of the log in last few days, and seems no abnormal, thanks for your help.


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18:14:35 (guided dither, 1 good cycles)
18:14:36 (ex=0.45 ey=1.05)
18:14:36 (guided dither, 2 good cycles)
18:14:43 (ex=2.46 ey=2.40)
18:14:43 (guided dither, 3 good cycles)
18:14:52 (ex=0.26 ey=1.53)
18:14:52 (guided dither, 4 good cycles)
18:14:58 (ex=1.52 ey=0.99)
18:14:58 (guided dither, 5 good cycles)
18:14:58 (guider check OK)
18:14:58 (starting exposure)


-------------------------------------------------------------------------
20:12:15 === Place in plan ===
20:12:15 Set 1 of 1
20:12:15 Target is "NGC2175_NGC2174" (3 of 6)
20:12:15 Repeat 1 of 1 for this target
20:12:15 Filter SII (1 of 1)
20:12:15 Image 4 of 4 for this filter
20:12:15 Imaging to NGC2175_NGC2174-SII-1800S-20151003-201215
20:12:15 (taking 1800 sec. exposure, SII filter, binning = 1)
20:12:15 (using 1 MHz (RBI Flood) readout mode)
20:12:15 (unguided dither - moving field dx=0.8 dy=2.0 pixels
20:12:15 (unguided dither 4 pixels std-dev, doing small slew)
20:12:15 Start slew to dither...
20:12:18 (starting exposure)


-------------------------------------------------------------------------
21:37:20 Doing auto-center...
21:37:20 Switching from SII to L filter for pointing exposure
21:37:29 (taking 5 sec. exposure, L filter, binning = 4)
21:37:29 (using 8 MHz readout mode)
21:38:07 (starting exposure)
21:38:12 **Script Error (Tracking has been stopped)**
21:38:13 Source: MaxIm.CCDCamera
21:38:15 Message: **Failed to start the exposure
21:38:15 Location: line 1458 column 33.
ACP console log closed 02-Oct-2015 21:38:16 UTC


-------------------------------------------------------------------------
14:31:31 === Place in plan ===
14:31:31 Set 1 of 1
14:31:31 Target is "M 17" (3 of 8)
14:31:31 Repeat 1 of 1 for this target
14:31:31 Filter SII (1 of 1)
14:31:31 Image 2 of 4 for this filter
14:31:31 Imaging to M 17-SII-1800S-20151005-143131
14:31:32 (taking 1800 sec. exposure, SII filter, binning = 1)
14:31:32 (using 1 MHz (RBI Flood) readout mode)
14:31:32 (dithering 4.0 pixels std-dev on guider)
14:31:32 (guided dither - moving guide star dx=0.9 dy=-1.3 guider pixels
14:31:32 (ex=1.09 ey=4.73)
14:31:32 (guided dither, 1 good cycles)
14:31:35 (ex=0.43 ey=5.78)
14:31:35 (guided dither, 2 good cycles)
14:31:44 (ex=0.69 ey=0.85)
14:31:44 (guided dither, 3 good cycles)
14:31:50 (ex=0.18 ey=0.77)
14:31:50 (guided dither, 4 good cycles)
14:31:56 (ex=0.82 ey=1.15)
14:31:56 (guided dither, 5 good cycles)
14:31:56 (guider check OK)
14:31:56 (starting exposure)