diff --git a/api/index.php b/api/index.php
index 3f1ab6338..c7db985e5 100644
--- a/api/index.php
+++ b/api/index.php
@@ -9,9 +9,6 @@ function serverError()
     }
 }
 
-// Impostazioni di Content-Type e Charset Header
-header('Content-Type: application/json; charset=UTF-8');
-
 // Gestione degli errori
 set_error_handler('serverError');
 register_shutdown_function('serverError');
@@ -70,5 +67,14 @@ try {
     $result = API::error('serverError');
 }
 
+json_decode($result);
+
+// Impostazioni di Content-Type e Charset Header
+if (json_last_error() == JSON_ERROR_NONE) {
+    header('Content-Type: application/json; charset=UTF-8');
+} else {
+    header('Content-Type: text/plain; charset=UTF-8');
+}
+
 // Stampa dei risultati
 echo $result;
diff --git a/modules/ddt/bulk.php b/modules/ddt/bulk.php
index b4427b54c..bf637cdf4 100644
--- a/modules/ddt/bulk.php
+++ b/modules/ddt/bulk.php
@@ -165,16 +165,6 @@ switch (post('op')) {
 return [
     'delete-bulk' => tr('Elimina selezionati'),
 
-    'export-bulk' => [
-        'text' => tr('Esporta stampe'),
-        'data' => [
-            'msg' => tr('Vuoi davvero esportare tutte le stampe in un archivio?'),
-            'button' => tr('Procedi'),
-            'class' => 'btn btn-lg btn-warning',
-            'blank' => true,
-        ],
-    ],
-
     'creafatturavendita' => [
         'text' => tr('Crea fattura'),
         'data' => [
diff --git a/modules/fatture/bulk.php b/modules/fatture/bulk.php
index 37efcf0d8..f35e609c4 100644
--- a/modules/fatture/bulk.php
+++ b/modules/fatture/bulk.php
@@ -25,12 +25,9 @@ switch (post('op')) {
                 $rapportino_nome = sanitizeFilename($numero.' '.$r['data'].' '.$r['ragione_sociale'].'.pdf');
                 $filename = slashes($dir.'tmp/'.$rapportino_nome);
 
-                $ptype = 'fatture';
+                $print = Prints::getModuleMainPrint($id_module);
 
-                $print = $dbo->fetchArray('SELECT id, previous FROM zz_prints WHERE directory = '.prepare($ptype).' ORDER BY main DESC LIMIT 1');
-                $id_print = $print[0]['id'];
-
-                Prints::render($id_print, $r['id'], $filename);
+                Prints::render($print['id'], $r['id'], $filename);
             }
 
             $dir = slashes($dir);
diff --git a/modules/interventi/bulk.php b/modules/interventi/bulk.php
index 82fb0dcca..2b3727ee8 100644
--- a/modules/interventi/bulk.php
+++ b/modules/interventi/bulk.php
@@ -32,12 +32,9 @@ switch (post('op')) {
                 $rapportino_nome = sanitizeFilename($numero.' '.date('Y_m_d', strtotime($r['data_richiesta'])).' '.$r['ragione_sociale'].'.pdf');
                 $filename = slashes($dir.'tmp/'.$rapportino_nome);
 
-                $ptype = 'interventi';
+                $print = Prints::getModuleMainPrint($id_module);
 
-                $print = $dbo->fetchArray('SELECT id, previous FROM zz_prints WHERE directory = '.prepare($ptype).' ORDER BY main DESC LIMIT 1');
-                $id_print = $print[0]['id'];
-
-                Prints::render($id_print, $r['id'], $filename);
+                Prints::render($print['id'], $r['id'], $filename);
             }
 
             $dir = slashes($dir);