it works !
Big thanks.
chmod 777 was decisive
Merci
Pascal

Thank you for that answer.
Excuse me for the delay but I had a hard time using Putty and the news, for me, rules to connect.
So I managed to do everything you proposed, but it does not work! I still can not install rfxtrx433xl
Do you have another idea?
Thanks in advance.
Pascal

Good evening, material: nas synology 211j, DSM 6.2.1 RFXTRX433XL No problem to install domoticz on the NAS but I can not install Rfxstx433xl. Domoticz does not seem to recognize the RFX, nothing is written in the box "serial port" when I chose "RFXCOM RFXTRX433 USB Transceiver" in the "Type" excuse ...