diff --git a/routes/web.php b/routes/web.php
index 6c09d999..4e9826ef 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -493,7 +493,13 @@ Route::get('/container/billing/{month}/{year}', function($month, $year){
                 ->first();
 
 
-            $packing_list_drop_date = PackingList::where('reference', $packingList->reference)->where('type', 1)->first()->transports->first()->drop_date;
+            $warehouseList = PackingList::where('reference', $packingList->reference)->where('type', 1)->first();
+            if($warehouseList){
+                $packing_list_drop_date = $warehouseList->transports->first()->drop_date;
+            } else {
+                echo '<------------- can\'t find arrival date -------------->';
+            }
+
             $order = $packingList->owner;
             $address = $order->addresses()->where('status', \App\Classes\ValueObjects\Constants\ApprovalStatus::APPROVED)->first();
             $warehouseId = $order->orderRoles()->where('role_id', OrderRoleTypes::ORIGIN_WAREHOUSE)->first()->company_module_id;