diff --git a/DM_Weight/ViewModels/AddToJiaoJieDialogViewModel.cs b/DM_Weight/ViewModels/AddToJiaoJieDialogViewModel.cs
index 2b909c6..00db46a 100644
--- a/DM_Weight/ViewModels/AddToJiaoJieDialogViewModel.cs
+++ b/DM_Weight/ViewModels/AddToJiaoJieDialogViewModel.cs
@@ -632,9 +632,9 @@ namespace DM_Weight.ViewModels
                                 List<ChannelStock> singleChannelsBoxSmart = record.FindAll(it => it.BoardType == 35);
                                 if ((singleChannelsBoxSmart.Count > 0 ? singleChannelsBoxSmart[0].BoardType : 1) == 35)
                                 {
-                                    singleChannelsBoxSmart.ForEach(it =>
+                                    singleChannelsBoxSmart.ForEach(async it =>
                                     {
-                                        _portUtil.WriteQuantityMethod((it.Quantity - it.TakeQuantity), it.DrawerNo, it.ColNo);
+                                        await _portUtil.WriteQuantityMethod((it.Quantity - it.TakeQuantity), it.DrawerNo, it.ColNo);
                                         Thread.Sleep(200);
                                     });
                                 }
diff --git a/DM_Weight/ViewModels/AddToJiaoJieWindowViewModel.cs b/DM_Weight/ViewModels/AddToJiaoJieWindowViewModel.cs
index 22de0bf..aeeb3ab 100644
--- a/DM_Weight/ViewModels/AddToJiaoJieWindowViewModel.cs
+++ b/DM_Weight/ViewModels/AddToJiaoJieWindowViewModel.cs
@@ -166,7 +166,8 @@ namespace DM_Weight.ViewModels
             }
             else
             {
-                _ChannelLists.Clear();
+                _ChannelLists?.Clear();
+                _ChannelLists = new List<ChannelList>();
             }
 
         }