Re: Error msg : Virtual Machine has 8 virtual CPUs, but the Host only supports 4. The Number of virtual CPUs may be limited by the guest OS selected for the Virtual Machine.

I found it, I had another 2950 in another cluster set to use EE+

I set the serve to use Essentials Plus and freed up the EE +

I then set theR510 to use EE+ and was able to migrate the VM