I am trying to troubleshoot a problem on a Windows 2003 server. An application needs to make use of a serial port but it appears some other application has the port open.
How can I identify what other application has the port open?
I have tried using SysInternals PORTMON but it is unable to attach to the serial port (COM1) reporting back that Portmon could not attach to SerialO-the device may be in use.