Why do I get an error stating "FTDI port is busy", when ispVM System opens?
There are features built into the ispVM system for debugging any unwanted/unexpected behaviour. These are generally disabled in the default settings. "FTDI port is Busy" error popup is due to one of such features being enabled unknowingly. To overcome this, go to "Options" menu and select "Monitor Download Cable connection" and choose "Disable". This should prevent the error pop windows.