First I would upgrade to 4.072 just to have the most current version.
I will tell you that I have Trend micro Client Server and have noted that I am getting errors on e prescribing (did not before), but did not have this problem in the past.
I don't know why you are having this problem - why 20 min. ?
I just tell all my staff (use IPMSG a freeware LAN IM program) to close any active charts and reboot server (they don't even have to really close AC but it is safer. Takes 3-4 minutes to take down and reboot.
