Wpantund[3000]: Unable to open socket


I was following the documntation to Configure wpantund
sudo wpantund -o Config:NCP:SocketPath /dev/cu.usbmodem14112 \

-o Config:TUN:InterfaceName utun7
-o Daemon:SyslogMask " -info"

I am getting this error
wpantund[3000]: Unable to open socket. “No such file or directory” (2) (filename = /dev/cu.usbmodem14112, type = 6)
wpantund[3000]: Unable to open socket with path </dev/cu.usbmodem14112>, errno=2 (No such file or directory)
wpantund[3000]: Runtime error thrown while starting up, “Unable to open socket”


You should replace /dev/cu.usbmodem14112 with your own serial port path.