Estimado: Al hacer una devolución me aparece el siguiente error. Software error: Can't call method "subfield" on an undefined value at /usr/share/koha/lib/C4/Biblio.pm line 3008. at /usr/share/koha/lib/C4/Biblio.pm line 3008. C4::Biblio::_AddBiblioNoZebra(103, undef, 'biblioserver') called at /usr/share/koha/lib/C4/Biblio.pm line 2769 C4::Biblio::ModZebra(103, 'specialUpdate', 'biblioserver', undef, undef) called at /usr/share/koha/lib/C4/Items.pm line 552 C4::Items::ModItem('HASH(0x9f04530)', undef, 12) called at /usr/share/koha/lib/C4/Items.pm line 598 C4::Items::ModDateLastSeen(12) called at /usr/share/koha/lib/C4/Circulation.pm line 1791 C4::Circulation::AddReturn(0040, 'TPL', undef, undef) called at /usr/share/koha/intranet/cgi-bin/circ/returns.pl line 218 For help, please send mail to the webmaster ( <mailto:webmaster@Biblioteca> webmaster@Biblioteca), giving this error message and the time and date of the error. Desde ya muchas gracias. Atte. Ernesto Wulf herrera