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Alex scratched their head. "But I'm not trying to open a file. I'm trying to open a serial port. Why is the system looking for a file?"
While not dedicated solely to serial ports, the Sysinternals Process Monitor is 64-bit compatible and can track file system and registry calls related to hardware communication.
Alex opened their trusty toolkit and launched , a powerful utility that acts like a surveillance camera for serial and parallel ports. Portmon would show exactly what data was traveling between the software and the hardware. portmon error 2
PortMon requires a kernel driver ( PORTMON.SYS or PMON.SYS ). On first launch, it extracts and loads this driver. Error 2 can appear if:
Alex refreshed Device Manager. There it was: USB Serial Port (COM1). Alex scratched their head
Portmon requires kernel-level access to monitor hardware ports. Even if you are logged into an admin account, you must explicitly right-click portmon.exe and select . This allows it to install the necessary hooks into the system. 2. Use Compatibility Mode
Alex stared at the screen. "Error 2."
It is ERROR_FILE_NOT_FOUND . Context: In Windows, hardware ports are treated as files (e.g., \\.\COM1 ). The error means the operating system cannot locate the "file" (the port) you are asking it to monitor.
mode com1: baud=9600 parity=n data=8 stop=1 Why is the system looking for a file