diff -ru a/tools/python/xen/xend/XendDomainInfo.py b/tools/python/xen/xend/XendDomainInfo.py
--- a/tools/python/xen/xend/XendDomainInfo.py	2007-09-12 17:54:01.000000000 -0600
+++ b/tools/python/xen/xend/XendDomainInfo.py	2007-09-12 17:55:43.000000000 -0600
@@ -2162,7 +2162,7 @@
             raise VmError('Invalid VM Name')
 
         dom =  XendDomain.instance().domain_lookup_nr(name)
-        if dom and dom.domid != self.domid:
+        if dom and dom.domid and dom.domid != self.domid:
             raise VmError("VM name '%s' already exists%s" %
                           (name,
                            dom.domid is not None and
Only in b/tools/python/xen/xend: XendDomainInfo.py~