Hello Carsten, Thanks for the answer! Yes, same version! Master installed on Windows 7 PRO - "slave" on Live image ISO. Firewall turned off for testing - not better! Do I have to add the slave in the DOM preferences? How can I find IP or hostname? Thanks a lot and kind regards Martin -----Ursprüngliche Nachricht----- Von: DCPomatic [mailto:dcpomatic-bounces@carlh.net] Im Auftrag von Carsten Kurz via DCPomatic Gesendet: Mittwoch, 16. August 2017 00:06 An: dcpomatic(a)carlh.net Betreff: Re: [DCP-o-matic] Configuration server Live image ISO Any possible firewall issues? Are you sure master and encoding server are the same DOM version? - Carsten _______________________________________________ DCPomatic mailing list DCPomatic(a)carlh.net http://main.carlh.net/cgi-bin/mailman/listinfo/dcpomatic _______________________________________________ DCPomatic mailing list DCPomatic(a)carlh.net http://main.carlh.net/cgi-bin/mailman/listinfo/dcpomatic