Are you getting similar errors for like floppy0 or cdrom ?
For debugging between two VMs, ensure the pipe name (e.g., \\.\pipe\com_1 ) matches on both ends.
Depending on your needs, you can either remove the device entirely or reconfigure it to clear the error. Option 1: Remove the Printer Device (Recommended) virtual device serial0 will start disconnected
[[defaults]] console = 2000 sparsemem = True ghostios = True # This does not suppress the message, but ensures faster boot
To completely disable the device, change the lines to match this configuration: serial0.present = "FALSE" Use code with caution. Are you getting similar errors for like floppy0 or cdrom
[[router R1]] image = c7200.bin serial0 = "disconnected"
Alternatively, if you want the device present but disconnected at boot time, edit the file to read: serial0.present = "TRUE" serial0.startConnected = "FALSE" Use code with caution. which uses a serial port internally.
A commonly overlooked cause is the VMware "Virtual Printer" feature, which uses a serial port internally.