Boy, there is a price to pay for adotable. the filter has to be (VIEWER = NULL AND UNITNO = 3 ) OR (VIEWER = NULL AND UNITNO = 4) ---------------------------------------------------------- Phil Scadden, Institute of Geological and Nuclear Sciences 764 Cumberland St, Private Bag 1930, Dunedin, New Zealand Ph +64 3 4799663, fax +64 3 477 5232