When I download MARC records from Z39.50 search, some records are added just fine, and others are not. Some appear to be added to the database but are not searchable. If I attempt to view those records in the "Normal" view, some or all of the data is missing, but I can see the entire record in the "Complete" view. If I look at the MySQL tables, I can see that data has been written to biblio and marc_biblio tables but no data has been written to the biblioitems and sometimes some of the other tables, such as bibliosubject. I can't find any reason for this, but it is completely consistent with specicific MARC records, If I have a problem with record, I have that problem no matter how many times I delete it and try to re-add it. Can anyone suggest what the problem might be and how how to fix this? Thank you. Paul