B #2689: add error handling (#4294)
B #2689: add error handling (#4294)


OpenNebula/one,OpenNebula/one,baby-gnu/one,OpenNebula/one,OpenNebula/one,baby-gnu/one,baby-gnu/one,baby-gnu/one,OpenNebula/one,baby-gnu/one,baby-gnu/one,baby-gnu/one,OpenNebula/one,OpenNebula/one,OpenNebula/one,baby-gnu/one,OpenNebula/one