We may have located a significant bug in the control software: A command was being sent during slewing, which is not allowed. It was sent due to some timeouts in the software.

Bug was found by Ingemar Lundström after some information from Howard Hedlund of Astro-Physics in Illinois.

Multiple meridian flips were tested after fixing the software – both from Engineering Mode and from scripts. No problems.

It is still an issue that Kill Switches should not be reached – we fear that some loss of calibration takes place then too, although the amount of de-calibration may not be total.