diff --git a/module/Media/src/Media/Model/MediaModel.php b/module/Media/src/Media/Model/MediaModel.php
index 9b25a6e5..c3ff332c 100644
--- a/module/Media/src/Media/Model/MediaModel.php
+++ b/module/Media/src/Media/Model/MediaModel.php
@@ -5,7 +5,7 @@
  * bareos-webui - Bareos Web-Frontend
  *
  * @link      https://github.com/bareos/bareos-webui for the canonical source repository
- * @copyright Copyright (c) 2013-2016 Bareos GmbH & Co. KG (http://www.bareos.org/)
+ * @copyright Copyright (c) 2013-2017 Bareos GmbH & Co. KG (http://www.bareos.org/)
  * @license   GNU Affero General Public License (http://www.gnu.org/licenses/)
  *
  * This program is free software: you can redistribute it and/or modify
@@ -33,8 +33,14 @@ public function getVolumes(&$bsock=null)
       if(isset($bsock)) {
          $cmd = 'llist volumes all';
          $result = $bsock->send_command($cmd, 2, null);
-         $volumes = \Zend\Json\Json::decode($result, \Zend\Json\Json::TYPE_ARRAY);
-         return $volumes['result']['volumes'];
+         if(preg_match('/Failed to send result as json. Maybe result message to long?/', $result)) {
+            $error = \Zend\Json\Json::decode($result, \Zend\Json\Json::TYPE_ARRAY);
+            return $error['result']['error'];
+         }
+         else {
+            $volumes = \Zend\Json\Json::decode($result, \Zend\Json\Json::TYPE_ARRAY);
+            return $volumes['result']['volumes'];
+         }
       }
       else {
          throw new \Exception('Missing argument.');
@@ -59,8 +65,14 @@ public function getVolumeJobs(&$bsock=null, $volume=null)
       if(isset($bsock, $volume)) {
          $cmd = 'llist jobs volume="'.$volume.'"';
          $result = $bsock->send_command($cmd, 2, null);
-         $volume = \Zend\Json\Json::decode($result, \Zend\Json\Json::TYPE_ARRAY);
-         return $volume['result']['jobs'];
+         if(preg_match('/Failed to send result as json. Maybe result message to long?/', $result)) {
+            $error = \Zend\Json\Json::decode($result, \Zend\Json\Json::TYPE_ARRAY);
+            return $error['result']['error'];
+         }
+         else {
+            $volume = \Zend\Json\Json::decode($result, \Zend\Json\Json::TYPE_ARRAY);
+            return $volume['result']['jobs'];
+         }
       }
       else {
          throw new \Exception('Missing argument.');
diff --git a/module/Media/view/media/media/details.phtml b/module/Media/view/media/media/details.phtml
index d49d056d..de76d290 100644
--- a/module/Media/view/media/media/details.phtml
+++ b/module/Media/view/media/media/details.phtml
@@ -111,6 +111,26 @@ $this->headTitle($title);
    echo $this->headLink()->prependStylesheet($this->basePath() . '/css/datatables.min.css');
 ?>
 
+<!-- modal-001 start -->
+<div id="modal-001" class="modal fade modal-001" tabindex="-1" role="dialog" aria-labelledby="mySmallModalLabel">
+  <div class="modal-dialog modal-md">
+    <div class="modal-content">
+   <div class="modal-header">
+   <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
+   <h4 class="modal-title" id="myModalLabel"><?php echo $this->translate("Failed to retrieve data from Bareos director"); ?></h4>
+      </div>
+      <div class="modal-body">
+   <p><?php echo $this->translate("Error message received from director:"); ?></p>
+   <p class="text-danger"><?php echo $this->translate("Failed to send result as json. Maybe the result message is too long?"); ?></p>
+      </div>
+      <div class="modal-footer">
+         <button type="button" class="btn btn-default" data-dismiss="modal"><?php echo $this->translate("Close"); ?></button>
+      </div>
+    </div>
+  </div>
+</div>
+<!-- modal-001 end -->
+
 <style>
 
 td.details-control:after {
@@ -418,6 +438,12 @@ $(document).ready(function() {
       ]
    });
 
+   $.fn.dataTable.ext.errMode = 'throw';
+
+   $('#voljobs').on('error.dt', function(e, settings, techNote, message) {
+      $("#modal-001").modal();
+   } );
+
 } );
 
 </script>
diff --git a/module/Media/view/media/media/index.phtml b/module/Media/view/media/media/index.phtml
index 8100dcea..cc751789 100644
--- a/module/Media/view/media/media/index.phtml
+++ b/module/Media/view/media/media/index.phtml
@@ -5,9 +5,8 @@
  * bareos-webui - Bareos Web-Frontend
  *
  * @link      https://github.com/bareos/bareos-webui for the canonical source repository
- * @copyright Copyright (c) 2013-2015 Bareos GmbH & Co. KG (http://www.bareos.org/)
+ * @copyright Copyright (c) 2013-2017 Bareos GmbH & Co. KG (http://www.bareos.org/)
  * @license   GNU Affero General Public License (http://www.gnu.org/licenses/)
- * @author    Frank Bergkemper
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
@@ -78,6 +77,26 @@ $this->headTitle($title);
    echo $this->headLink()->prependStylesheet($this->basePath() . '/css/datatables.min.css');
 ?>
 
+<!-- modal-001 start -->
+<div id="modal-001" class="modal fade modal-001" tabindex="-1" role="dialog" aria-labelledby="mySmallModalLabel">
+  <div class="modal-dialog modal-md">
+    <div class="modal-content">
+   <div class="modal-header">
+   <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
+   <h4 class="modal-title" id="myModalLabel"><?php echo $this->translate("Failed to retrieve data from Bareos director"); ?></h4>
+      </div>
+      <div class="modal-body">
+   <p><?php echo $this->translate("Error message received from director:"); ?></p>
+   <p class="text-danger"><?php echo $this->translate("Failed to send result as json. Maybe the result message is too long?"); ?></p>
+      </div>
+      <div class="modal-footer">
+         <button type="button" class="btn btn-default" data-dismiss="modal"><?php echo $this->translate("Close"); ?></button>
+      </div>
+    </div>
+  </div>
+</div>
+<!-- modal-001 end -->
+
 <style>
 
 td.details-control:after {
@@ -237,6 +256,12 @@ $(document).ready(function() {
       }
    } );
 
+   $.fn.dataTable.ext.errMode = 'throw';
+
+   $('#volumes').on('error.dt', function(e, settings, techNote, message) {
+      $("#modal-001").modal();
+   } );
+
 } );
 
 </script>
diff --git a/module/Pool/src/Pool/Model/PoolModel.php b/module/Pool/src/Pool/Model/PoolModel.php
index 66ab4658..e28adcdb 100644
--- a/module/Pool/src/Pool/Model/PoolModel.php
+++ b/module/Pool/src/Pool/Model/PoolModel.php
@@ -77,8 +77,14 @@ public function getPoolMedia(&$bsock=null, $pool=null)
       if(isset($bsock, $pool)) {
          $cmd = 'llist media pool="'.$pool.'"';
          $result = $bsock->send_command($cmd, 2, null);
-         $media = \Zend\Json\Json::decode($result, \Zend\Json\Json::TYPE_ARRAY);
-         return $media['result']['volumes'];
+         if(preg_match('/Failed to send result as json. Maybe result message to long?/', $result)) {
+            $error = \Zend\Json\Json::decode($result, \Zend\Json\Json::TYPE_ARRAY);
+            return $error['result']['error'];
+         }
+         else {
+            $media = \Zend\Json\Json::decode($result, \Zend\Json\Json::TYPE_ARRAY);
+            return $media['result']['volumes'];
+         }
       }
       else {
          throw new \Exception('Missing argument.');
diff --git a/module/Pool/view/pool/pool/details.phtml b/module/Pool/view/pool/pool/details.phtml
index 2c043b68..69f53d46 100644
--- a/module/Pool/view/pool/pool/details.phtml
+++ b/module/Pool/view/pool/pool/details.phtml
@@ -5,9 +5,8 @@
  * bareos-webui - Bareos Web-Frontend
  *
  * @link      https://github.com/bareos/bareos-webui for the canonical source repository
- * @copyright Copyright (c) 2013-2015 Bareos GmbH & Co. KG (http://www.bareos.org/)
+ * @copyright Copyright (c) 2013-2017 Bareos GmbH & Co. KG (http://www.bareos.org/)
  * @license   GNU Affero General Public License (http://www.gnu.org/licenses/)
- * @author    Frank Bergkemper
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
@@ -110,6 +109,26 @@ $this->headTitle($title);
    echo $this->headLink()->prependStylesheet($this->basePath() . '/css/datatables.min.css');
 ?>
 
+<!-- modal-001 start -->
+<div id="modal-001" class="modal fade modal-001" tabindex="-1" role="dialog" aria-labelledby="mySmallModalLabel">
+  <div class="modal-dialog modal-md">
+    <div class="modal-content">
+   <div class="modal-header">
+   <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
+   <h4 class="modal-title" id="myModalLabel"><?php echo $this->translate("Failed to retrieve data from Bareos director"); ?></h4>
+      </div>
+      <div class="modal-body">
+   <p><?php echo $this->translate("Error message received from director:"); ?></p>
+   <p class="text-danger"><?php echo $this->translate("Failed to send result as json. Maybe the result message is too long?"); ?></p>
+      </div>
+      <div class="modal-footer">
+         <button type="button" class="btn btn-default" data-dismiss="modal"><?php echo $this->translate("Close"); ?></button>
+      </div>
+    </div>
+  </div>
+</div>
+<!-- modal-001 end -->
+
 <style>
 
 td.details-control:after {
@@ -284,6 +303,13 @@ $(document).ready(function() {
          tr.addClass('shown');
       }
    } );
+
+   $.fn.dataTable.ext.errMode = 'throw';
+
+   $('#volumes').on('error.dt', function(e, settings, techNote, message) {
+      $("#modal-001").modal();
+   } );
+
 } );
 
 </script>