diff --git a/tools/python/xen/web/SrvBase.py b/tools/python/xen/web/SrvBase.py
index 11b1d48f24..59eb313b3e 100644
--- a/tools/python/xen/web/SrvBase.py
+++ b/tools/python/xen/web/SrvBase.py
@@ -86,7 +86,7 @@ class SrvBase(resource.Resource):
             except Exception, exn:
                 log.exception("Request %s failed.", op)
                 if req.useSxp():
-                    return ['xend.err', "Exception: " + str(exn)]
+                    return ['xend.err', str(exn)]
                 else:
                     return "<p>%s</p>" % str(exn)
 
diff --git a/tools/python/xen/xend/server/SrvDomain.py b/tools/python/xen/xend/server/SrvDomain.py
index a5c5dbfee7..535d9323f4 100644
--- a/tools/python/xen/xend/server/SrvDomain.py
+++ b/tools/python/xen/xend/server/SrvDomain.py
@@ -146,13 +146,13 @@ class SrvDomain(SrvDir):
     def op_device_destroy(self, op, req):
         return self.call(self.dom.destroyDevice,
                          [['type', 'str'],
-                          ['dev',  'int']],
+                          ['dev',  'str']],
                          req)
                 
     def op_device_configure(self, op, req):
         return self.call(self.dom.device_configure,
                          [['config', 'sxpr'],
-                          ['dev',    'int']],
+                          ['dev',    'str']],
                          req)
 
 
diff --git a/tools/python/xen/xend/server/blkif.py b/tools/python/xen/xend/server/blkif.py
index a15edf0963..d60607f0f4 100644
--- a/tools/python/xen/xend/server/blkif.py
+++ b/tools/python/xen/xend/server/blkif.py
@@ -22,6 +22,7 @@ import string
 
 from xen.util import blkif
 from xen.xend import sxp
+from xen.xend.XendError import VmError
 
 from xen.xend.server.DevController import DevController
 
diff --git a/tools/python/xen/xm/main.py b/tools/python/xen/xm/main.py
index 11e2ff7194..54d72195bc 100644
--- a/tools/python/xen/xm/main.py
+++ b/tools/python/xen/xm/main.py
@@ -169,11 +169,9 @@ def handle_xend_error(cmd, dom, ex):
     if error == "Not found" and dom != None:
         err("Domain '%s' not found when running 'xm %s'" % (dom, cmd))
         sys.exit(1)
-    elif error == "Exception: Device not connected":
-        err("Device not connected")
-        sys.exit(1)
     else:
-        raise ex
+        err(error)
+        sys.exit(1)
     
 
 #########################################################################