upgrade vsphere management assistant
when upgrading from vma 4 to vma 4.1:
sudo vima-update scan
sudo vima-update update
after vma is upgraded to 4.1 the command becomes vma-update.
to check the vma build run “cat /etc/vma-release”
see http://resinblade.net/?p=1088 for info on upgrading vma 5.1