Problem getting XEN instances

Since some days my domUs show up as “No SSH” in Cloudmin.
This is the error i get when finding xen isntances on the registered dom0:

Finding Xen configuration files under /etc/xen, /xen .. .. found 3 files Finding running Xen instances .. .. failed : Usage: xm list [options] [Domain, ...] List information about all/some domains. -l, --long Output all VM details in SXP --label Include security labels --state= Select only VMs with the specified state Error: (9, 'Bad file descriptor')

any ideas where the problem could be?