Hi all, i am trying to create virtual box using libvirt , following is xml i tried to use following xml (followed example in libvirt site . <a href="http://libvirt.org/drvvbox.html">http://libvirt.org/drvvbox.html</a>) <domain type='vbox'> <name>vboxtest</name> <os> <type>hvm</type> <boot dev='hd'/> <boot dev='cdrom'/> </os> <memory>393216</memory> <vcpu>1</vcpu> <features> <acpi/> </features> <devices> <disk type='file' device='cdrom'> <source file=''/> <target dev='hdc'/> <readonly/> </disk> <disk type='file' device='disk'> <source file='/d1/vir_box/ub.vdi'/> <target dev='hdd'/> </disk> <interface type='bridge'> <source bridge='eth0'/> <mac address='00:15:C5:ED:63:E6'/> </interface> <interface type='user'> <mac address='00:15:C5:ED:63:E6'/> <model type='Am79C973'/> </interface> <parallel type='dev'> <source path='/dev/pts/1'/> <target port='0'/> </parallel> <parallel type='dev'> <source path='/dev/pts/2'/> <target port='1'/> </parallel> <serial type="dev"> <source path="/dev/ttyS0"/> <target port="0"/> </serial> </devices> </domain> now i have few questions/doubts on the xml (i have working vdi file which is created using GUI and has ubuntu installed , i just want to start that using another machine ) as soon as i try following code i am getting segfault , i am suspecting some problem with xml input import libvirt conn=libvirt.open('vbox:///session') xmldesc = <above string> dom=conn.createLinux(xmldesc,0) Segmentation fault in my home directory/Machines xml file is created <?xml version="1.0"?> <VirtualBox xmlns="<a href="http://www.innotek.de/VirtualBox-settings">http://www.innotek.de/VirtualBox-settings</a>" version="1.9-linux"> <Machine uuid="{9e37e287-67e3-ca78-5af0-9c38f14de49e}" name="vboxtest" OSType="Other" lastStateChange="2010-03-22T10:29:18Z" aborted="true"> <Hardware version="2"> <CPU count="1"> <HardwareVirtEx enabled="true" exclusive="true"/> <HardwareVirtExNestedPaging enabled="true"/> <HardwareVirtExVPID enabled="true"/> <PAE enabled="false"/> </CPU> <Memory RAMSize="384"/> <Boot> <Order position="1" device="Floppy"/> <Order position="2" device="DVD"/> <Order position="3" device="HardDisk"/> <Order position="4" device="None"/> </Boot> <Display VRAMSize="8" monitorCount="1" accelerate3D="false" accelerate2DVideo="false"/> <RemoteDisplay enabled="false" port="3389" authType="Null"/> <BIOS> <ACPI enabled="true"/> <IOAPIC enabled="false"/> <Logo fadeIn="true" fadeOut="true" displayTime="0"/> <BootMenu mode="MessageAndMenu"/> <TimeOffset value="0"/> <PXEDebug enabled="false"/> </BIOS> <USBController enabled="false" enabledEhci="false"/> <Network> <Adapter slot="0" enabled="false" MACAddress="080027F53A84" cable="true" speed="0" type="Am79C973"/> <Adapter slot="1" enabled="false" MACAddress="080027EE31BD" cable="true" speed="0" type="Am79C973"/> <Adapter slot="2" enabled="false" MACAddress="080027CE9DA5" cable="true" speed="0" type="Am79C973"/> <Adapter slot="3" enabled="false" MACAddress="080027D86B0D" cable="true" speed="0" type="Am79C973"/> <Adapter slot="4" enabled="false" MACAddress="080027DAA33F" cable="true" speed="0" type="Am79C973"/> <Adapter slot="5" enabled="false" MACAddress="08002734F6E6" cable="true" speed="0" type="Am79C973"/> <Adapter slot="6" enabled="false" MACAddress="08002747D785" cable="true" speed="0" type="Am79C973"/> <Adapter slot="7" enabled="false" MACAddress="080027C22A98" cable="true" speed="0" type="Am79C973"/> </Network> <UART> <Port slot="0" enabled="false" IOBase="0x3f8" IRQ="4" hostMode="Disconnected"/> <Port slot="1" enabled="false" IOBase="0x3f8" IRQ="4" hostMode="Disconnected"/> </UART> <LPT> <Port slot="0" enabled="false" IOBase="0x378" IRQ="4"/> <Port slot="1" enabled="false" IOBase="0x378" IRQ="4"/> </LPT> <AudioAdapter controller="AC97" driver="ALSA" enabled="false"/> <SharedFolders/> <Clipboard mode="Bidirectional"/> <Guest memoryBalloonSize="0" statisticsUpdateInterval="0"/> <GuestProperties/> </Hardware> <StorageControllers/> </Machine> </VirtualBox> please help me if i am doing anything wrong , how can i specify storage controller in xml file and any input on why it is aborting with segfault sorry for the long post and xml -- Madhu