Hi, a VM has snapshots which are unable to remove during when the VM is up. Therefore I power down the Windows Server 2012 VM. The snapshots are still unable to remove and the VM can't boot anymore !!! This is the message from engine.log ------------------ Message: VM srv03 is down with error. Exit message: Bad volume specification ------------------ Clone is not possible I get: ------------------ Message: VDSM command failed: Image is not a legal chain ------------------ All others VM's can be powered down and start without any problem. What can I do? This is very important because now no one can work :-( !!! cheers gregor