diff --git a/docs/tracking.md b/docs/tracking.md
index b6fd2ae..1888e8b 100644
--- a/docs/tracking.md
+++ b/docs/tracking.md
@@ -12,6 +12,10 @@ $tracking->PiecesEnabled = 'S';
 
 $client = new Web($this->getEnvironment());
 $xml_response = $client->call($tracking);
+
+$result = new TrackingResponse();
+$result->initFromXML($xml_response);
+echo $result->AWBInfo->Status->ActionStatus;
 ```
 
 If you need XML request for the DHL certification you can obtain by calling the following code 
diff --git a/src/Datatype/AM/ShipmentInfo.php b/src/Datatype/AM/ShipmentInfo.php
index 55db2c4..65d5d67 100644
--- a/src/Datatype/AM/ShipmentInfo.php
+++ b/src/Datatype/AM/ShipmentInfo.php
@@ -55,12 +55,13 @@ class ShipmentInfo extends Base
         'ShipmentDate' => [
             'type' => 'dateTime',
             'required' => false,
-            'subobject' => true,
+            'subobject' => false,
         ],
         'Pieces' => [
-            'type' => '',
+            'type' => 'Piece',
             'required' => false,
             'subobject' => true,
+            'multivalues' => true,
         ],
         'Weight' => [
             'type' => 'string',
diff --git a/src/Datatype/EU/ShipmentInfo.php b/src/Datatype/EU/ShipmentInfo.php
index 412a3f8..65196f9 100644
--- a/src/Datatype/EU/ShipmentInfo.php
+++ b/src/Datatype/EU/ShipmentInfo.php
@@ -49,7 +49,7 @@ class ShipmentInfo extends \Mtc\Dhl\Datatype\AM\ShipmentInfo
         'ShipmentDate' => [
             'type' => 'dateTime',
             'required' => false,
-            'subobject' => true,
+            'subobject' => false,
         ],
         'Pieces' => [
             'type' => 'Piece',