Glen,
? ?I'm not familiar with VirtCom.
? ?Are you talking about the Yaesu Virtual Serial port (enhanced) ?? ? This is the COM port in the PC that YCAT needs.
? ?Also, if you have RTS set in the radio, then Flow Control needs to be checked.? ?If RTS is off, then Flow Control needs to be unchecked.
? ?Let me know if this helps.? ?If not, we can dig deeper and find out the root cause.
Best regards,
? ? Steve - KC5NK