"If a communications port has been set up with a TRUE value for the fAbortOnError member of the setup DCB structure, the communications software will terminate all read and write operations on the communications port when a communications error occurs." (my emphasis)

I don't want it to stop!
I just want to know which of the received bytes had the error.

The "error" (9th bit set) will be on the 1st byte (address) of each message - I fear this would cause it to lose the rest of the message?