Unknown Cardinality DSG0002

I've been getting this error , Unknown Cardinality DSG0002, in Designer (XI3.2) on joins between tables and views and in one case between a table and an aliased table. The cardinality is set and is correct, moreover other similar joins are not giving this error.

It seems to have no logic behind it that I can determine. What could be causing this?

Ah no, spoke too soon. Sorted

Edited by: Bartlett John on Sep 3, 2009 4:33 PM