Onehost importvm to import wild VM failed

When I try to import a wild vm I receive:

Error creating disk from template: [one.image.allocate] Not enough space in datastore

In /var/log/one/oned.log I see

Wed Mar 21 14:04:01 2018 [Z0][ReM][D]: Req:3840 UID:0 one.system.config result SUCCESS, “<AUTH_MAD>…”
Wed Mar 21 14:04:01 2018 [Z0][ReM][E]: Req:5216 UID:0 one.image.allocate result FAILURE [one.image.allocate] Not enough space in datastore

Anyone a clue about this error ?