our $category = $query->param('category');
our $authorized = 1;
our $errcode = 0;
-our @biblios;
+our @biblios = ();
+# if virtualshelves is disabled, leave immediately
+if ( ! C4::Context->preference('virtualshelves') ) {
+ print $query->redirect("/cgi-bin/koha/errors/404.pl");
+ exit;
+}
if (scalar(@biblionumber) == 1) {
@biblionumber = (split /\//,$biblionumber[0]);