Failure writing state info to observing plan (was **Script error...)

[rspostrspost]

Bob, I am running a on a Mathis mount with SiTech control under ACP 6. In the attached run plan, I was running 5 sets of images in 1 hr intervals. The first set completed and then ACP waited for the second set time. At the start time, it took one image at the correct RA and Dec. Started to slew and went to the target and then failed.07:00:50 ==== Starting target NGC 6764 ====07:00:50 (wait for slew to complete)07:00:53 (slew complete)07:00:53 (no slew, scope already within max error of target)07:00:53 Ready for NGC 6764 (# 2 of 24 in set 2)07:00:53 **Script Error (Tracking has been stopped)**07:00:53 Source: ACP Observatory Control Software07:00:53 Message: at line 1392 column 40.ACP console log closed 06-Jul-2013 07:00:53 UTC Can you help diagnose the source of the script error? Thanks, Dick. I have continued to run for the next 2 nights, the same plan. Both failed during the second set, both with the error after a few images but with the error at line 1230. I had removed only the plan error Waitfor 30 which had no effect. Dick