[Koha] Problem downloading from Z39.50 search

[Paul Yachnes]

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