avrdude: ser_open(): can't open device "\\.\COM4": Le fichier est introuvable

Development Tools IDE 1.x
1

Hi,

This is my first trial.

I selected Tools > port "COM4 Arduino(Arduino/Genuino Uno)"
which is my only available port.

Where is this "\.\COM4" missing file ?

Thanks for help

Jean

2

No idea about the problem. What does device manager say when you connect and disconnect the Arduino? Is it indeed COM4 that shows and disappears?

3

Hi !

Thanks for your interest.
I don't know what was the problem, but this evening, it works.

This little blinking LED is full of promises...

Thanks again
Jean