I am testing out oVirt 3.5 rc5 and their appears to be a problem when I try to change CDs on a live VM. I get the error message "Error while executing action Change CD: Internal Engine Error.". This is a very basic setup. I pushed through the engine install on a fully patched CentOS 6.5 machine; The hypervisor is CentOS 7. I have a remote ISO / NFS share. Everything else appears to be right; so I hope it is not something that I am doing...