Dear All, It seems that the Z39.50 Search does not work by [LC Call Number]. There is nothing displayed on the screen, but I did look at the koha_error-log The below is the message displayed: Use of uninitialized value in subroutine entry at /usr/local/lib/perl/5.10.0/ZOOM.pm line 493, <DATA> line 522., referer: http://10.105.42.88:8080/cgi-bin/koha/cataloguing/z3950_search.pl Looking at the code Line 493, the function is below: sub search_pqf { my $this = shift(); my($pqf) = @_; my $_rs = Net::Z3950::ZOOM::connection_search_pqf($this->_conn(), $pqf); <--This is line 493 I think --> $this->_check(); return _new ZOOM::ResultSet($this, $pqf, $_rs); } Can someone please help? I am using Koha - Ubuntu 9.10 - Version 3.00.00 - Zebra 2.0 Best Regards,