diff --git a/synda/sdt/sddmdefault.py b/synda/sdt/sddmdefault.py
index 19d3aeaf..926e548e 100755
--- a/synda/sdt/sddmdefault.py
+++ b/synda/sdt/sddmdefault.py
@@ -344,7 +344,14 @@ def transfers_begin(transfers):
             "Exception occured while retrieving certificate ({})".format(e),
         )
 
-        raise
+        sdlog.error("SDDMDEFA-503","  continue_on_cert_errors=%s"%
+                    preferences.is_download_continue_on_cert_errors )
+        if preferences.is_download_continue_on_cert_errors:
+            sdlog.error("SDDMDEFA-504","Ignoring exception")
+            pass  # Try to keep on going, probably a certificate isn't needed.
+        else:
+            sdlog.error("SDDMDEFA-505","Re-raising exception")
+            raise
 
     for tr in transfers:
         start_transfer_thread(tr)
diff --git a/synda/source/config/file/user/preferences/dao/create/models.py b/synda/source/config/file/user/preferences/dao/create/models.py
index b6e31469..b1ff4dde 100755
--- a/synda/source/config/file/user/preferences/dao/create/models.py
+++ b/synda/source/config/file/user/preferences/dao/create/models.py
@@ -110,7 +110,7 @@ def __init__(self, full_filename):
         config.set('download', 'http_fallback', 'false')
         config.set('download', 'gridftp_opt', '')
         # config.set('download', 'incremental_mode_for_datasets', 'false')
-        # config.set('download', 'continue_on_cert_errors', 'false')
+        config.set('download', 'continue_on_cert_errors', 'false')
         config.set('download', 'url_max_buffer_size', '3500')
 
         # nouvelles variables
diff --git a/synda/source/config/file/user/preferences/models.py b/synda/source/config/file/user/preferences/models.py
index c5598153..d2d34929 100755
--- a/synda/source/config/file/user/preferences/models.py
+++ b/synda/source/config/file/user/preferences/models.py
@@ -169,6 +169,10 @@ def download_max_parallel_download_per_datanode(self):
     def download_url_max_buffer_size(self):
         return self.get_data().getint('download', 'url_max_buffer_size')
 
+    @property
+    def is_download_continue_on_cert_errors(self):
+        return self.get_data().getboolean('download', 'continue_on_cert_errors')
+
     @property
     def download_gridftp_opt(self):
         return self.get_data().get('download', 'gridftp_opt')