diff --git a/product/ERP5/Document/BusinessTemplate.py b/product/ERP5/Document/BusinessTemplate.py
index 37266171416a250a9eadfeff5e7a9f904280db90..b45622c0381b2e795c5b0389076a1487b1b672bf 100644
--- a/product/ERP5/Document/BusinessTemplate.py
+++ b/product/ERP5/Document/BusinessTemplate.py
@@ -4968,9 +4968,14 @@ Business Template is a set of definitions, such as skins, portal types and categ
       self._catalog_local_role_key_item = \
           CatalogLocalRoleKeyTemplateItem(
                self.getTemplateCatalogLocalRoleKeyList())
-      self._catalog_security_uid_column_item = \
+      try:
+        self._catalog_security_uid_column_item = \
           CatalogSecurityUidColumnTemplateItem(
                self.getTemplateCatalogSecurityUidColumnList())
+      except AttributeError:
+        # be backwards compatible with old zope instances which
+        # do not contain recent version of erp5_property_sheets
+        pass
 
     security.declareProtected(Permissions.ManagePortal, 'build')
     def build(self, no_action=0):
@@ -5584,7 +5589,12 @@ Business Template is a set of definitions, such as skins, portal types and categ
             (SimpleItem.SimpleItem,), {'__module__': module_id}))
 
       for item_name in self._item_name_list:
-        getattr(self, item_name).importFile(bta)
+        item_object = getattr(self, item_name)
+        # this check is due to backwards compatability when there can be a
+        # difference between install erp5_property_sheets (esp. BusinessTemplate
+        # property sheet) 
+        if item_object is not None:
+          item_object.importFile(bta)
 
       # Remove temporary modules created above to allow import of real modules
       # (during the installation).
diff --git a/product/ERP5Catalog/CatalogTool.py b/product/ERP5Catalog/CatalogTool.py
index e8e3e2e70336f6e7272cc80d81694561539a2550..3e15e1720d614ec53747ec440e3e32f7cac5dd3f 100644
--- a/product/ERP5Catalog/CatalogTool.py
+++ b/product/ERP5Catalog/CatalogTool.py
@@ -515,8 +515,7 @@ class CatalogTool (UniqueObject, ZCatalog, CMFCoreCatalogTool, ActiveObject):
               try:
                 local_roles_group_id = brain.local_roles_group_id
               except AttributeError:
-                LOG("ERP5Catalog", PROBLEM,
-                    "sql_search_security is not up to date, falling back.")
+                # backwards compatability in cases when catalog use default schema
                 local_roles_group_id = ''
               security_uid_dict.setdefault(local_roles_group_id,
                   []).append(brain.uid)