diff --git a/VERSION b/VERSION
index fc3343e5..e59ff10e 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-Version 2.00.0 (2012-08-06 20:54:15) dev
+Version 2.00.0 (2012-08-06 21:24:31) dev
diff --git a/gluon/dal.py b/gluon/dal.py
index 892ecaee..cf159784 100644
--- a/gluon/dal.py
+++ b/gluon/dal.py
@@ -7487,7 +7487,10 @@ class Table(dict):
                     new_fields.append((ofield,ofield.update))
         for ofield in self:
             if ofield.compute:
-                new_fields.append((ofield,ofield.compute(Row(fields))))
+                try:
+                    new_fields.append((ofield,ofield.compute(Row(fields))))
+                except KeyError:
+                    pass
             if not update and ofield.required and not ofield.name in new_fields_names:
                 raise SyntaxError,'Table: missing required field: %s' % ofield.name
         return new_fields