I have a lab that I was testing the cluster wide upgrade however I have had a few issues. First I tried to mount the .iso on the DVD but when I did this the subscribers would give me an error saying they could not download the software. When that didn't work I attempted to use SFTP. This did work to get the software download however both of my subscribers failed at step 7 of the installation. The publisher is still installing but when it is complete, I am unsure where to go from there. Do I just install the upgrade on each sub or should I do a cluster wide again?