Flowcode Support Board

I' m using funduino UNO R3.

Hi
I had this issue with my UNO R3 using a USB to serial device what solved it for me was setting the Baudrate of the USB to serial to 115000 as what the boot-loader on the UNO is looking for ,It is worth a try.
Another question is this a genuine ARDUINO UNO or a Chinese clone as some of the clones the bootloader is set at 57600 and avrdude never connects to them you have to reprogram them with the correct boot loader from the Arduino IDE

I have the funduino uno r3. I 've ateched the com 4 traffic.

Looks like avrdude cannot get access to COM4
As Ben asked, is there any other application on your PC using COM4?
Such as Arduino IDE/monitor?