diff --git a/mobile.netbiblio.php b/mobile.netbiblio.php
index b35d437..c0bd5de 100644
--- a/mobile.netbiblio.php
+++ b/mobile.netbiblio.php
@@ -395,11 +395,19 @@ class NetBiblio extends WebService
         }
         $s->addSortField('availabilityDate');
 
-        $results = $s->getResults(0, $itemsByGroup);
+        try {
+            $results = $s->getResults(0, $itemsByGroup);
+        } catch(SolrClientException $e) {
+            throw new WebException ("SolrError", $e->getMessage(), -710);
+        }
 
         $ids = array_map(function($r) { return $r['id']; }, $results['response']['docs']);
         $books = AudioBook::findBy('NoticeID', $ids, true);
-        $this->data = array_map(array($this, 'AddFiles'), $books);
+        $books = array_map(array($this, 'AddFiles'), $books);
+
+        foreach($books as $b) {
+            $this->data[$b['type']][] = $b;
+        }
     }
 
     protected function Output()