diff --git a/objets.py b/objets.py
index a63f041..1f73c9d 100644
--- a/objets.py
+++ b/objets.py
@@ -1059,9 +1059,12 @@ class proprio(CransLdapObject):
     def machines(self, mode=None, refresh=False):
         """Renvoie la liste des machines"""
         if self._machines is None or refresh:
-            self._machines = self.conn.search(u'mid=*', dn = self.dn, scope = 1, mode=self.mode if mode is None else mode)
-            for m in self._machines:
-                m._proprio = self
+            try:
+                self._machines = self.conn.search(u'mid=*', dn = self.dn, scope = 1, mode=self.mode if mode is None else mode)
+                for m in self._machines:
+                    m._proprio = self
+            except ldap.NO_SUCH_OBJECT:
+                self._machines = []
         return self._machines
 
     def factures(self, refresh=False, mode=None):
@@ -1072,9 +1075,13 @@ class proprio(CransLdapObject):
             if self._factures[0].mode != mode:
                 refresh = True
         if self._factures is None or refresh:
-            self._factures = self.conn.search(u'fid=*', dn = self.dn, scope = 1, mode=mode)
-            for m in self._factures:
-                m._proprio = self
+            try:
+                self._factures = self.conn.search(u'fid=*', dn = self.dn, scope = 1, mode=mode)
+                for m in self._factures:
+                    m._proprio = self
+            # Si on manipule un objet pas encore enregistré dans la la bdd
+            except ldap.NO_SUCH_OBJECT:
+                self._factures = []
         return self._factures
 
     def delete(self, comm="", login=None):
@@ -1150,9 +1157,12 @@ class machine(CransLdapObject):
     def certificats(self, refresh=False):
         """Renvoie la liste des certificats de la machine"""
         if refresh or self._certificats is None:
-            self._certificats = self.conn.search(u'xid=*', dn = self.dn, scope = 1, mode=self.mode)
-            for m in self._certificats:
-                m._machine = self
+            try:
+                self._certificats = self.conn.search(u'xid=*', dn = self.dn, scope = 1, mode=self.mode)
+                for m in self._certificats:
+                    m._machine = self
+            except ldap.NO_SUCH_OBJECT:
+                self._certificats = []
         return self._certificats
 
     def blacklist_actif(self, excepts=[]):