Live Migration debuggin

Hi,
I'm having trouble with the live migration function of Proxmox cluster. With the original VMs when I tried to do a live migrate between hosts it would give me an error message about using local disks even when those VM disks were moved to an NFS storage or a gluster store flagged as shared.
"ERROR: migration aborted (duration 00:00:01): Failed to sync data - can't do online migration - VM uses local disks"

After creating a new VM on the nfs shared storage the local disk error went away and now it fails without a useful error message.
Mar 14 12:15:35 copying disk images
Mar 14 12:15:35 starting VM 112 on remote node 'vmhost3'
Mar 14 12:15:36 starting migration tunnel
Mar 14 12:15:37 starting online/live migration on port 60000
Mar 14 12:15:37 migrate_set_speed: 8589934592
Mar 14 12:15:37 migrate_set_downtime: 0.1
Mar 14 12:15:39 ERROR: online migrate failure - aborting
Mar 14 12:15:39 aborting phase 2 - cleanup resources
Mar 14 12:15:39 migrate_cancel
Mar 14 12:15:39 ERROR: migration finished with problems (duration 00:00:04)
TASK ERROR: migration problems

Is there a way to get a more detailed error message for the migration tool to find out what the error actually is? The pve/.debug option just gives a huge amount of debug data about the config cluster fs but very little else.