Windows Arduino IDE upload fails


#1

I cannot upload an Arduino sketch to the HiFive1. I receive the following error. Googling returns a number of hits with this error over several years but none are for Windows.

Error: unable to open ftdi device with vid 0403, pid 6010, description ‘Dual RS232-HS’, serial ‘’ at bus location '

Other items:
Installed the FTDI Driver successfully.
Rebooted several times.
The IDE reports 2 active serial ports 6 and 7, but only port 7 responds to the IDE’s Serial Monitor.
Serial Monitor communicates - when the board is reset the logo prints on the SM.

My System:
Windows 10
FTDI Driver loaded
Arduino IDE 1.85
Board “HiFive1”
CPU Clock Frequency to “256MHz PLL”
Programmer to “SiFive OpenOCD”

Error:
Open On-Chip Debugger 0.10.0+dev-gdd0dd7f64e03-dirty (2018-01-09-17:24)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
debug_level: 0
adapter speed: 10000 kHz
Error: libusb_open() failed with LIBUSB_ERROR_NOT_SUPPORTED
Error: libusb_open() failed with LIBUSB_ERROR_NOT_FOUND
Error: no device found
Error: unable to open ftdi device with vid 0403, pid 6010, description ‘Dual RS232-HS’, serial ‘’ at bus location '
the selected serial port does not exist or your board is not connected