Error executing image transfer script

I want to create a vertical machine on opennebula, but he can’t copy the iso image.
here is the error that appears on sunstone :

Error executing image transfer script: Error copying ubuntu:/var/lib/one//datastores/1/34f78ccdfe12ab8e272b8302416fb147 to localhost:/var/lib/one//datastores/0/20/disk.0

help me please.


Do you have the SSH passwordless properly configured?