Folks have been having troubles running YT under Desqview. This
happens when they do not define the COM port in the window that is running YT.
The solution is to define the port (COM1 or COM2) in the DV window. This will
solve the problem and YT will run just fine. QuickBasic correctly detects that
there is no COM port defined and will terminate with an ERROR 64 rather than
grabbing the port regardless of the DV configuration.