diff --git a/AMESCoreStudio.Web/Controllers/PCSController.cs b/AMESCoreStudio.Web/Controllers/PCSController.cs
index c436f769..d0c9eff4 100644
--- a/AMESCoreStudio.Web/Controllers/PCSController.cs
+++ b/AMESCoreStudio.Web/Controllers/PCSController.cs
@@ -1533,13 +1533,17 @@ namespace AMESCoreStudio.Web.Controllers
                 model.wipBoard = await _pcsApi.GetWipBoard(model.wipInfo.WipNO);
                 if (model.wipBoard != null)
                 {
-                    model.wipBoard.Engineer_Name = _sysApi.GetUserInfoByUserNo(model.wipBoard.Engineer).InvokeAsync().Result.UserName;
+                    var UserInof = _sysApi.GetUserInfoByUserNo(model.wipBoard.Engineer).InvokeAsync().Result;
+                    if (UserInof != null)
+                        model.wipBoard.Engineer_Name = UserInof.UserName;
                 }
 
                 model.wipSystem = await _pcsApi.GetWipSystem(model.wipInfo.WipNO);
                 if (model.wipSystem != null)
                 {
-                    model.wipSystem.Engineer_Name = _sysApi.GetUserInfoByUserNo(model.wipSystem.Engineer).InvokeAsync().Result.UserName;
+                    var UserInof = _sysApi.GetUserInfoByUserNo(model.wipSystem.Engineer).InvokeAsync().Result;
+                    if (UserInof != null)
+                        model.wipSystem.Engineer_Name = UserInof.UserName;
                 }
 
                 model.wipMAC = await _pcsApi.GetWipMAC(model.wipInfo.WipNO);