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

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

Topic		Replies	Views
avrdude: ser_open(): can't open device "\\.\COM3": The system cannot find the fi IDE 1.x	2	3136	May 5, 2021
uploading problem : avrdude: ser_open(): can't open device "\\.\COM4": IDE 1.x	2	1099	May 5, 2021
can't open device "\\.\COM1": Le fichier spécifié est introuvable Français	5	7397	May 6, 2021
avrdude: ser_open(): can't open device "\\.\COM1: Impossibile trovare il file Generale	8	9072	May 7, 2021
avrdude: ser_open(): can't open device "\\.\COM3": The system cannot find the fi IDE 1.x	2	2199	May 5, 2021