virtualbox@gateway:~$ vboxmanage controlvm vSRV002 pause virtualbox@gateway:~$ vboxmanage showvminfo vSRV002 | grep -i state State: paused (since 2013-01-04T12:16:15.119000000) virtualbox@gateway:~$ vboxmanage snapshot vSRV002 delete backup 0%... Progress state: NS_ERROR_FAILURE VBoxManage: error: Snapshot operation failed VBoxManage: error: Failed to perform an online medium merge (VERR_INVALID_PARAMETER) VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component Console, interface IConsole VBoxManage: error: Context: "int handleSnapshot(HandlerArg*)" at line 431 of file VBoxManageSnapshot.cpp virtualbox@gateway:~$