I am having a similar problem but I use tan track. I get the following error after i try to reset my beds:
Error #: 8005 - Port already open
Form: frmWaitingList::Get_Status()
Additional: T_MAX.Get_Status(Port #: 4, COMM Settings: 9600,n,8,1)
Line Number: 0
Possible Explanation:
TanTrack was trying to talk to your timer but for some reason the COM port was already in use. This can occur when using programs like 'AdNet' while running TanTrack.
Any thoughts?