[Koha] Problem after upgrading

[MJ Ray]

alaa Badri <elbadri_father at hotmail.com>
> I upgrade koha 3 to koha 3.6 but i have aproblem with check out book i got this massage
> Software error:
> Can't call method "subfield" on an undefined value at /usr/share/koha/lib/C4/Biblio.pm line 2982.
> 
> any help

Have you run the upgrade script to split books and items?  (See INSTALL file.)

Does it happen with one book or all books?

Hope that helps,
-- 
MJ Ray (slef), member of www.software.coop, a for-more-than-profit co-op.
http://koha-community.org supporter, web and library systems developer.
In My Opinion Only: see http://mjr.towers.org.uk/email.html
Available for hire (including development) at http://www.software.coop/