I tried with the traceback. Here is the output: [('<stdin>', 3, '?', None), ('/usr/lib/python2.3/site-packages/libvirt.py', 268, 'lookupByID', "if ret is None:raise libvirtError('virDomainLookupByID() failed')")] [('<stdin>', 3, '?', None), ('/usr/lib/python2.3/site-packages/libvirt.py', 268, 'lookupByID', "if ret is None:raise libvirtError('virDomainLookupByID() failed')")] Thanks Omer <div>On 6/27/07, Daniel P. Berrange <<a href="mailto:berrange@redhat.com">berrange@redhat.com</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> On Wed, Jun 27, 2007 at 03:39:30PM +0200, Omer Khalid wrote: > Hi, > > I have the following code working on libvirt 0.1.9: > > ######################################## > conn = libvirt.openReadOnly (None) > if conn == None: > print 'Failed to open connection to the hypervisor' > #sys.exit(1) > > try: > domains = conn.listDomainsID() > num = conn.numOfDomains() > except: > print 'Failed to find the list of domains' > > for i in range(num): > try: > dom0 = conn.lookupByID(domains[i]) > domInfo = dom0.info() > except: > print "Unexpected error:", sys.exc_info() > > ############################################## > > For legacy reason, I have to get it working on libvirt 0.1.8 but I am > constantly getting the following error: > > Unexpected error: (<class libvirt.libvirtError at 0xb7f49f2c>, < > libvirt.libvirtError instance at 0xb7f4f2cc>, <traceback object at > 0xb7f44c5c>) Try adding an exception handler that prints out useful information rather than raw python object references for a start... Its impossible to debug this unless you get the text associated with the exception. Regards, Dan. -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: <a href="http://search.cpan.org/~danberr/"> http://search.cpan.org/~danberr/</a> -=| |=- Projects: <a href="http://freshmeat.net/~danielpb/">http://freshmeat.net/~danielpb/</a> -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=| </blockquote></div> -- ---------------------------------------------------------- CERN – European Organization for Nuclear Research, IT Department, CH-1211 Geneva 23, Switzerland Phone: +41 (0) 22 767 2224 Fax: +41 (0) 22 766 8683 E-mail : <a href="mailto:Omer.Khalid@cern.ch">Omer.Khalid@cern.ch</a> Homepage: <a href="http://cern.ch/Omer.Khalid">http://cern.ch/Omer.Khalid</a>