Security Updates RHEL 7.1

I installed the Server with Fujitsu ServerView Suite and RHEL 7.1 DVD's. Server is a TX1310-M1 and according to Fujits is 100% supported. I have server set to 7.1, subscription-manager release --set=7.1. When I try,
yum update --security --downloadonly --downloaddir=/mnt/RH-Security --skip-broken, I get an error, . What I don't understand is, that earlier I did a complete update and it worked fine. But then I had problems with our Software. That's why I wanted to do just security updates. I also want to save the files, because if this works, I will be installing many servers for our customers and they all have to have the same software stand.