diff --git a/Rs.SkyLine/Flow/TestCenter.cs b/Rs.SkyLine/Flow/TestCenter.cs
index 628727e..53046cc 100644
--- a/Rs.SkyLine/Flow/TestCenter.cs
+++ b/Rs.SkyLine/Flow/TestCenter.cs
@@ -275,7 +275,7 @@ namespace Rs.MotionPlat.Flow
             if (info.SiloType == SchedulingSiloBase.ESiloType.Multifunction)
             {
                 TraySlot ts = GlobalTray.MultiTray.GetSlot(Controls.ESlotStatus.NotHave);
-                if (ts.Column == 0)//无需重排
+                if (ts == null || ts.Column == 0)//无需重排
                 {
                     TurnoverInfos tis = new TurnoverInfos();
                     tis.GroupID = 0;
@@ -293,7 +293,7 @@ namespace Rs.MotionPlat.Flow
             else if (info.SiloType == SchedulingSiloBase.ESiloType.Passed)
             {
                 TraySlot ts = GlobalTray.OkTary.GetSlot(Controls.ESlotStatus.NotHave);
-                if (ts.Column==0)//无需重排
+                if (ts==null || ts.Column==0)//无需重排
                 {
                     TurnoverInfos tis = new TurnoverInfos();
                     tis.GroupID = 0;
@@ -311,7 +311,7 @@ namespace Rs.MotionPlat.Flow
             else if (info.SiloType == SchedulingSiloBase.ESiloType.Failed)
             {
                 TraySlot ts = GlobalTray.NgTray.GetSlot(ESlotStatus.NotHave);
-                if (ts.Column == 0)
+                if (ts == null || ts.Column == 0)
                 {
                     TurnoverInfos tis = new TurnoverInfos();
                     tis.GroupID = 0;