diff --git a/lib/Alchemy/Phrasea/WorkerManager/Controller/AdminConfigurationController.php b/lib/Alchemy/Phrasea/WorkerManager/Controller/AdminConfigurationController.php
index 790d5eb111..db0337df47 100644
--- a/lib/Alchemy/Phrasea/WorkerManager/Controller/AdminConfigurationController.php
+++ b/lib/Alchemy/Phrasea/WorkerManager/Controller/AdminConfigurationController.php
@@ -6,6 +6,7 @@
 use Alchemy\Phrasea\Controller\Controller;
 use Alchemy\Phrasea\Model\Entities\WorkerRunningJob;
 use Alchemy\Phrasea\Model\Repositories\WorkerRunningJobRepository;
+use Alchemy\Phrasea\Plugin\Exception\JsonValidationException;
 use Alchemy\Phrasea\SearchEngine\Elastic\ElasticsearchOptions;
 use Alchemy\Phrasea\Twig\PhraseanetExtension;
 use Alchemy\Phrasea\WorkerManager\Event\PopulateIndexEvent;
@@ -19,6 +20,7 @@
 use Alchemy\Phrasea\WorkerManager\Queue\MessagePublisher;
 use Alchemy\Phrasea\WorkerManager\Worker\RecordsActionsWorker\RecordsActionsWorker;
 use Doctrine\ORM\OptimisticLockException;
+use Exception;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 use Symfony\Component\Form\Form;
 use Symfony\Component\Form\FormInterface;
@@ -117,7 +119,7 @@ public function infoAction(PhraseaApplication $app, Request $request)
         if ($timeFilter != null) {
             try {
                 $dateTimeFilter = (new \DateTime())->sub(new \DateInterval($timeFilter));
-            } catch (\Exception $e) {
+            } catch (Exception $e) {
             }
         }
 
@@ -502,28 +504,32 @@ public function recordsActionsAction(PhraseaApplication $app, Request $request)
 
     public function recordsActionsFacilityAction(PhraseaApplication $app, Request $request)
     {
-        $ret = ['tasks' => []];
-        $job = new RecordsActionsWorker($app);
-        switch ($request->get('ACT')) {
-            case 'PLAYTEST':
-                $sxml = simplexml_load_string($request->get('xml'));
-                if (isset($sxml->tasks->task)) {
-                    foreach ($sxml->tasks->task as $sxtask) {
-                        $ret['tasks'][] = $job->calcSQL($sxtask, true);
+        $ret = [
+            'error' => null,
+            'tasks' => []
+        ];
+        try {
+            $job = new RecordsActionsWorker($app);
+            switch ($request->get('ACT')) {
+                case 'PLAYTEST':
+                case 'CALCTEST':
+                case 'CALCSQL':
+                    $sxml = simplexml_load_string($request->get('xml'));
+                    if ((string)$sxml['version'] !== '2') {
+                        throw new JsonValidationException(sprintf("bad settings version (%s), should be \"2\"", (string)$sxml['version']));
                     }
-                }
-                break;
-            case 'CALCTEST':
-            case 'CALCSQL':
-                $sxml = simplexml_load_string($request->get('xml'));
-                if (isset($sxml->tasks->task)) {
-                    foreach ($sxml->tasks->task as $sxtask) {
-                        $ret['tasks'][] = $job->calcSQL($sxtask, false);
+                    if (isset($sxml->tasks->task)) {
+                        foreach ($sxml->tasks->task as $sxtask) {
+                            $ret['tasks'][] = $job->calcSQL($sxtask, $request->get('ACT') === 'PLAYTEST');
+                        }
                     }
-                }
-                break;
-            default:
-                throw new NotFoundHttpException('Route not found.');
+                    break;
+                default:
+                    throw new NotFoundHttpException('Route not found.');
+            }
+        }
+        catch (Exception $e) {
+            $ret['error'] = $e->getMessage();
         }
 
         return $app->json($ret);
diff --git a/lib/Alchemy/Phrasea/WorkerManager/Worker/RecordsActionsWorker/RecordsActionsWorker.php b/lib/Alchemy/Phrasea/WorkerManager/Worker/RecordsActionsWorker/RecordsActionsWorker.php
index 9102506c1c..5bdbfbba10 100644
--- a/lib/Alchemy/Phrasea/WorkerManager/Worker/RecordsActionsWorker/RecordsActionsWorker.php
+++ b/lib/Alchemy/Phrasea/WorkerManager/Worker/RecordsActionsWorker/RecordsActionsWorker.php
@@ -6,6 +6,7 @@
 use Alchemy\Phrasea\Core\Configuration\PropertyAccess;
 use Alchemy\Phrasea\Model\Entities\WorkerRunningJob;
 use Alchemy\Phrasea\Model\Repositories\WorkerRunningJobRepository;
+use Alchemy\Phrasea\Plugin\Exception\JsonValidationException;
 use Alchemy\Phrasea\WorkerManager\Queue\MessagePublisher;
 use Alchemy\Phrasea\WorkerManager\Worker\WorkerInterface;
 use collection;
@@ -53,6 +54,10 @@ public function process(array $payload)
             return 0;
         }
         else {
+            $sxSettings = simplexml_load_string($xmlSettings);
+            if((string)$sxSettings['version'] !== "2") {
+                throw new JsonValidationException(sprintf("bad settings version (%s), should be \"2\"", (string)$sxml['version']));
+            }
             $em = $this->repoWorker->getEntityManager();
             $em->beginTransaction();
 
@@ -73,15 +78,14 @@ public function process(array $payload)
                 $em->rollback();
             }
 
-            $settings = simplexml_load_string($xmlSettings);
-            $tasks = array();
-            foreach($settings->tasks->task as $task) {
-                $tasks[] = $task;
+            $sxTasks = array();
+            foreach($sxSettings->tasks->task as $sxTask) {
+                $sxTasks[] = $sxTask;
             }
 
             try {
                 // process will act on db, so we first fetch all...
-                $data = $this->getData($tasks);
+                $data = $this->getData($sxTasks);
                 // ... then process
                 foreach ($data as $record) {
                     $this->processData($record);
@@ -119,12 +123,12 @@ public function process(array $payload)
         }
     }
 
-    private function getData(array $tasks)
+    private function getData(array $sxTasks)
     {
         $ret = [];
 
         /** @var SimpleXMLElement $sxtask */
-        foreach ($tasks as $sxtask) {
+        foreach ($sxTasks as $sxtask) {
             $task = $this->calcSQL($sxtask);
 
             if (!$task['active'] || !$task['sql']) {
diff --git a/templates/web/admin/worker-manager/worker_records_actions.html.twig b/templates/web/admin/worker-manager/worker_records_actions.html.twig
index 695f5c88a7..708bb923df 100644
--- a/templates/web/admin/worker-manager/worker_records_actions.html.twig
+++ b/templates/web/admin/worker-manager/worker_records_actions.html.twig
@@ -172,9 +172,20 @@
                 , dataType:'json'
                 , type:"POST"
                 , async:true
+                , error: function(data) {
+                    $("#sqla").html(data.statusText);
+                }
                 , success:function(data) {
+                    if(data.error) {
+                        $("#sqla").text(data.error);
+                        return;
+                    }
                     t = "";
                     for (i in data.tasks) {
+                        // o = $("<div></div>")
+                        //     .append($("<span>&nbsp;X&nbsp;</span>"))
+                        // ;
+                        //$("#sqla").append()
                         t += "<div class=\"title\">&nbsp;";
                         if (data.tasks[i].active) {
                             t += "<span class=\"active\">&nbsp;X&nbsp;</span>&nbsp;";