Has anyone had success setting up their Koha - MARC links so that they eliminate errors on the Check MARC page. I'm reluctant to set up the biblio.biblionumber and biblioitems.biblioitemnumber fields in the 090a and 090b fields because we use these for our LC call numbers. Here are the settings I have tried, without success: for items.itemnumber, 995s. for biblioitems.itemtype, 840h. for items.homebranch, 852a and for items.holdingbranch, 852b. for biblioitems.biblionumber, 851e and for biblioitems.biblioitemnumber, 851f. Larry Currie -- Lawrence W. Currie User Services Librarian California Academy of Sciences Golden Gate Park San Francisco, CA 94118 lcurrie@calacademy.org (415) 750-7108 (415) 750-7106 fax http://www.calacademy.org/research/library/