diff --git a/addons/base_calendar/crm_meeting.py b/addons/base_calendar/crm_meeting.py
index 93bbe66389b..b5757f34c3f 100644
--- a/addons/base_calendar/crm_meeting.py
+++ b/addons/base_calendar/crm_meeting.py
@@ -79,11 +79,12 @@ class crm_meeting(osv.Model):
             context = {}
         parent_model = context.get('active_model')
         parent_ids = context.get('active_ids')
-        for meeting in self.browse(cr, uid, ids, context=context):
-            message = _("Meeting scheduled at '%s'<br> Subject: %s") % (meeting.date, meeting.name)
-            if meeting.duration:
-                message = message+_("<br> Duration: %s hour(s)") % (str(meeting.duration))
-            self.pool.get(parent_model).message_post(cr, uid, parent_ids, body=message,context=context)
+        if parent_model in self.pool and hasattr(self.pool[parent_model], 'message_post'):
+            for meeting in self.browse(cr, uid, ids, context=context):
+                message = _("Meeting scheduled at '%s'<br> Subject: %s") % (meeting.date, meeting.name)
+                if meeting.duration:
+                    message = message+_("<br> Duration: %s hour(s)") % (str(meeting.duration))
+                self.pool.get(parent_model).message_post(cr, uid, parent_ids, body=message,context=context)
         return True