($trans_date) = @{$self->{fixed_fields}};
- $ils->check_inst_id($fields->{FID_INST_ID}, "handle_end_patron_session");
+ $ils->check_inst_id($fields->{(FID_INST_ID)}, 'handle_end_patron_session');
($status, $screen_msg, $print_line) = $ils->end_patron_session($fields->{(FID_PATRON_ID)});