My VM settings according to your guidelines are
I am selecting
1- the Port Number to dropdown menu to"COM1"
2- with Port Mode dropdown menu to "Hostpipe"
3- checked and then unchecked the "create pipe" option (in both case the error message is same, shown below),
4- Port/File Path "/dev/ttyS0", as you saying.
when I start the Virtual machine, ti shows error message as shown below,
"Failed to start the virtual machine
namedPipe#0 failed to connect to local socket /dev/ttyS0
Unknown error creating VM (VERR_ACCESS_DENIED)."
One thing I want to ask you, that When I was created the VM, the I add also the serial port with its default Port mode dropdown menu settings which is "Disconnected", On the creation time, My thought that I will configure it latter,
Is we can add and configure other components for Vmachine, after installation or NOT.