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?