diff --git a/src/WMS.Web.Repositories/OutStockTaskRepositories.cs b/src/WMS.Web.Repositories/OutStockTaskRepositories.cs
index d6d9c144..3ce221cc 100644
--- a/src/WMS.Web.Repositories/OutStockTaskRepositories.cs
+++ b/src/WMS.Web.Repositories/OutStockTaskRepositories.cs
@@ -279,13 +279,13 @@ namespace WMS.Web.Repositories
 
             List<int> taskIds = new List<int>();
             //序列码出库单
-            if (dto.SerialNumbers.Count() > 0)
+            if (dto.SerialNumbers != null && dto.SerialNumbers.Count() > 0)
             {
                 var res = await _outStockRepositories.GetEntityListBySerialNumbers(dto.SerialNumbers);
                 taskIds.AddRange(res.Select(s => s.TaskId));
             }
             //箱号取出库单
-            if (dto.BoxBillNos.Count() > 0)
+            if (dto.BoxBillNos != null && dto.BoxBillNos.Count() > 0)
             {
                 var res = await _outStockRepositories.GetEntityListByBoxBillNos(dto.BoxBillNos);
                 taskIds.AddRange(res.Select(s => s.TaskId));