Hi people, I am new using libvirt for Java I created a class to test my conecction with XEN, but it is throwing a exception that I can't figure out how I solve this. Does anyone knoe how to configure it correctly? I cat use this class from the command line: $ javac -classpath /usr/java/jdk1.6.0_34/bin/libvirt-0.4.9.jar test.java $ java -classpath .:/usr/java/jdk1.6.0_34/bin/jna.jar:/usr/java/jdk1.6.0_34/bin/libvirt-0.4.9.jar test and it connect to the XEN. But when I put the code on my eclipse it doesn't work any more. ... conn = new Connect("xen:///", true); .... libvir: XML-RPC error : authentication failed: Error checking for authorization org.libvirt.unix.manage: Remote Exception invoking org.freedesktop.PolicyKit1.Authority.CheckAuthorization() on /org/freedesktop/PolicyKit1/Authority at name org.freedesktop.PolicyKit1: org.freedesktop.PolicyKit1.Error.Failed: Action org.libvirt.unix.manage is not registered exception caught:org.libvirt.LibvirtException: authentication failed: Error checking for authorization org.libvirt.unix.manage: Remote Exception invoking org.freedesktop.PolicyKit1.Authority.CheckAuthorization() on /org/freedesktop/PolicyKit1/Authority at name org.freedesktop.PolicyKit1: org.freedesktop.PolicyKit1.Error.Failed: Action org.libvirt.unix.manage is not registered level:VIR_ERR_ERROR code:VIR_ERR_AUTH_FAILED domain:VIR_FROM_RPC hasConn:false hasDom:false hasNet:false message:authentication failed: Error checking for authorization org.libvirt.unix.manage: Remote Exception invoking org.freedesktop.PolicyKit1.Authority.CheckAuthorization() on /org/freedesktop/PolicyKit1/Authority at name org.freedesktop.PolicyKit1: org.freedesktop.PolicyKit1.Error.Failed: Action org.libvirt.unix.manage is not registered str1:authentication failed: %s str2:Error checking for authorization org.libvirt.unix.manage: Remote Exception invoking org.freedesktop.PolicyKit1.Authority.CheckAuthorization() on /org/freedesktop/PolicyKit1/Authority at name org.freedesktop.PolicyKit1: org.freedesktop.PolicyKit1.Error.Failed: Action org.libvirt.unix.manage is not registered str3:null int1:-1 int2:-1 Exception in thread "main" java.lang.NullPointerException at TestLibVirt.main(TestLibVirt.java:88) -- *-- Felipe Oliveira Gutierrez* *-- **lipe.82(a)gmail.com* <lipe.82(a)gmail.com&gt; *-- https://sites.google.com/site/lipe82/Home/diaadia*