Error System.Dynamic etc. coming from TheSky

[Arto Oksanen]

I am getting this error with all plans and also with the web interface:

Logging to C:\Users\sirius\Documents\ACP Astronomy\Logs\20191028\20191028@204029.log
Initializing AcquireSupport V8.2.14
Telescope is ACP->Driver for telescope connected through TheSky, driver V3
Dome is MaxDome
MaxIm DL is version 6.20
Imager is SBIG Universal
Selecting filter Luminance from previous ACP run at 20191012@113843 UTC
Imager readout modes:
0 is Raw
1 is Raw w/RBI pre-flash
Autoguiding is disabled
Calculated unbinned plate scales (arcsec/pix): H = 0.55 V = 0.55
Calculated field of view (arcmin): H = 37.4 V = 37.4
Plate solving with UCAC4 (questionable for pointing)
This is AcquireImages V8.2.1
Hardware pier side reporting is available.
Compiling plan...
(using ACP Plan Compiler V8.1.0)
Warning at line 5: #sets 1 is unnecessary
(5) -> #sets 1


Total warnings 1
----------------------------


...plan OK!
This plan has 3 live target(s), 30 images
There are 15.0 min. of actual imaging time
Image file set-numbers start with 517
Starting run for plan KIC8462852.txt...
==== Starting target KIC8462852 ====
;#waituntil 1,22:00:00
(turning tracking on for live image(s))
Start slew to KIC8462852...
(wait for slew to complete)
(slew complete)
(request plan-start pointing update)
Ready for KIC8462852 (# 1 of 3 in set 1)
KIC8462852 will be repeated 10 times.
=== Starting target repeat 1 of 10 ===
Selecting B filter (1) for imaging
Pointing update: Wait and flip if within 120 sec of flip point
[flip check: Tn=420s HAc=17284s GW=T HAz=17704s DWz=T WF=no]
Updating pointing...
(taking 5 sec. exposure, Luminance filter, binning = 4)
(using Raw readout mode)
(starting exposure)
(exposure complete)
(exposure complete and image downloaded)
Image finished
Plate-solve pointing image.
1250 image stars found
4984 catalog stars found
Solved! 255 stars matched.
Average residual is 0.19 arcsec.
Pointing error is 15.635 arcmin @ angle 219.91
True focal length is 3392.7 mm.
True binned plate scales (arcsec/pix): H = 2.19 V = 2.19
True image center (J2000): 20h 05m 19.4s 44° 15' 24.17"
Imager sky position angle is 356.1 deg.
**Script Error (Tracking has been stopped)**
Source: System.Dynamic
Message: Objektin viittaukseksi ei voi määrittää objektiesiintymää. (Sorry for the Finnish "Object reference not set to an instance of an object.")
Location: line 1533 column 33.

What is wrong? This is the first try with clear sky and real telescope (Paramount ME/TheSkyX) and CCD (SBIG STX-16803 / MaxImDL6). Everything worked with the simulators.

arto