Rkdeveloptool Error Creating Comm Object failed!

Rock_PI3A]$ rkdeveloptool -v
rkdeveloptool ver 1.32
Rock_PI3A]$ lsusb
Bus 001 Device 016: ID 2207:350a Fuzhou Rockchip Electronics Company
Rock_PI3A]$ rkdeveloptool ld
DevNo=1 Vid=0x2207,Pid=0x350a,LocationID=101 Maskrom
Rock_PI3A]$ sudo rkdeveloptool db rk356x_spl_loader_ddr1056_v1.10.111.bin
Creating Comm Object failed!
Rock_PI3A]$ sudo rkdeveloptool db
Did not find loader item in config!

rkdeveloptool with Manjaro does not work

Rock3A don’t boot e no HDMI video out - led green ON and after led blu ON

Creating Comm Object failed! is a common error of rkdeveloptool, it’s mostly like the USB signal issue. Check with other USB cable or change a USB port.

I buy this cable “LINDY 36751 Cavetto USB Anthra Line USB 3.0 Tipo Maschio A/A, 1 m, Nero”
nothing has changed, same mistake – HELP

HDMI now works I plugged the 3A rock on a PC monitor instead of a TV monitor