diff --git a/addons/caldav/wizard/calendar_event_import.py b/addons/caldav/wizard/calendar_event_import.py
index 11f9f9b4afb..434904092e4 100644
--- a/addons/caldav/wizard/calendar_event_import.py
+++ b/addons/caldav/wizard/calendar_event_import.py
@@ -27,6 +27,7 @@ import time
 import tools
 import wizard
 import base64
+import logging
 
 class calendar_event_import(osv.osv_memory):
     """
@@ -56,7 +57,11 @@ class calendar_event_import(osv.osv_memory):
             id2 = data_obj._get_id(cr, uid, 'caldav', 'view_calendar_event_import_display')
             if id2:
                  id2 = data_obj.browse(cr, uid, id2, context=context).res_id
-            vals = model_obj.import_cal(cr, uid, base64.decodestring(data['file_path']), context['active_id'], context)
+            vals = None
+            try:
+                vals = model_obj.import_cal(cr, uid, base64.decodestring(data['file_path']), context['active_id'], context)
+            except:
+                raise osv.except_osv(_('Warning !'),_('Invalid format of the ics, file can not be imported'))
             global cnt
             if vals:
                 cnt = len(vals)