diff --git a/gestion/whos.py b/gestion/whos.py
index 301b1c96..a6c34984 100755
--- a/gestion/whos.py
+++ b/gestion/whos.py
@@ -601,10 +601,13 @@ def machine_details(machine) :
             f += '\n'
 
         if (machine.prise() != 'N/A'):
-            f += coul(u'VLANs : ', 'gras')
-            from hptools import sw_prise
-            f += ', '.join(sw_prise(machine.prise()).vlans())
-            f += '\n' 
+            try:
+                f += coul(u'VLANs : ', 'gras')
+                from hptools import sw_prise
+                f += ', '.join(sw_prise(machine.prise()).vlans())
+                f += '\n' 
+            except:
+                pass
             
         f += coul(u'Puissance : ','gras') + u"%4.d" % int(machine.puissance())
         f += coul(u'\tCanaux : ', 'gras') + machine.canal()