On Wed, 8 Aug 2007 15:41:41 +0100, Dr R. Sanderson wrote: >If I understand the question, then yes. It's what we call a non fatal >diagnostic -- the process completed as successfully as it could, it's >just that it can't give the absolute number of matching records. > >Rob >========================================================================= Yes I think that you understood my question. I found the following in http://www.loc.gov/standards/sru/specs/diagnostics.html "Surrogate diagnostics take the place of the record for which they are a surrogate in the 'records' parameter of the response. Non-surrogate records, both fatal and non-fatal, are returned in the 'diagnostics' parameter." I wonder how many clients out there can handle a "Non-surrogate" diagnostic parameter among the usual records. However this won't be a problem for us now so let's proceed. Regards RogerW.