If one of the SiTech GUIs hangs or reports a comms error, the easiest fix is as follows:
# 1. Close all GUIs in this order, using the x in the top left-hand corner of each:
i. ObservatoryControlSAAO.exe;
ii. DomeControlTCP.exe, both left and right SiTechRotatorTCP.exe and SiTechFocuserTCP.exe in any order;
iii. ServoSCommunicator.exe
iv. SiTechExe.exe
Then follow the instructions on [[#Starting SiTech software| starting SiTech software]] to restart.