Check for updates don't check for Version 1.2.1
in Bug Reports
From 1.2.0 if I go to check for updates this returns "you are already in the latest version"
Comments
However, if you verified this connection and it still won't work consider a reboot. If it STILL not working you can manually install the newest update.
you are using a Raspberry Pi?
If so login into the terminal and enter:
wget https://download3.repetier.com/files/server/debian-armhf/Repetier-Server-1.2.1-Linux.deb
sudo dpkg -i Repetier-Server-1.2.1-Linux.deb
rm Repetier-Server-1.2.1-Linux.deb
ping download3.repetier.com
However you can also use download1 instead which is a different download server.
"unable to resolve host address " should not happen. This means pi does not have a name server accessible to resolve domain names. Check file /etc/resolv.conf to see which nameserver are set. If non is included try adding manually
nameserver 8.8.8.8
and retry. But since the file gets generated setting will be overwritten sooner or later. It normally gets send via DHCP from your router setting.