Value Cannot Be Null Error

antasp3136 · July 25, 2016, 2:59pm

Keep getting this error a few times a day but not 100% sure from what…

-----------------------------
[General Info]

Application: SambaPOS
Version:     5.1.58
Region:      en
DB:          SQ
Machine:     BBC-REG02
User:        bigbitez
Date:        7/22/2016
Time:        9:59 PM

User Explanation:

bigbitez said ""
-----------------------------

[Exception Info 1]

Top-level Exception
Type:        System.ArgumentNullException
Message:     Value cannot be null.
Parameter name: source
Source:      System.Core
Stack Trace: at System.Linq.Enumerable.Where[TSource](IEnumerable`1 source, Func`2 predicate)
   at Samba.Modules.TicketModule.Widgets.TicketLister.TicketListerWidgetViewModel.OnCommandExecute(String commandName)
   at Microsoft.Practices.Prism.Commands.DelegateCommand`1.<>c__DisplayClass6.<.ctor>b__2(Object o)
   at Microsoft.Practices.Prism.Commands.DelegateCommandBase.Execute(Object parameter)
   at Microsoft.Practices.Prism.Commands.DelegateCommandBase.System.Windows.Input.ICommand.Execute(Object parameter)
   at MS.Internal.Commands.CommandHelpers.CriticalExecuteCommandSource(ICommandSource commandSource, Boolean userInitiated)
   at System.Windows.Controls.Primitives.ButtonBase.OnClick()
   at System.Windows.Controls.Primitives.ToggleButton.OnClick()
   at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   at System.Windows.UIElement.OnMouseLeftButtonUpThunk(Object sender, MouseButtonEventArgs e)
   at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
   at System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
   at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
   at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   at System.Windows.Application.RunDispatcher(Object ignore)
   at System.Windows.Application.RunInternal(Window window)
   at System.Windows.Application.Run(Window window)
   at Samba.Presentation.App.Main()

-----------------------------

[Assembly Info]

mscorlib, Version=4.0.0.0
DevExpress.Xpf.LayoutControl.v14.1, Version=14.1.11.0
System.Xml, Version=4.0.0.0
DevExpress.Xpf.Grid.v14.1, Version=14.1.11.0
System, Version=4.0.0.0
DevExpress.Xpf.Grid.v14.1.Core, Version=14.1.11.0
WindowsBase, Version=4.0.0.0
System.Xaml, Version=4.0.0.0
Samba.Domain, Version=1.0.0.0
System.Core, Version=4.0.0.0
PresentationFramework, Version=4.0.0.0
Samba.Infrastructure, Version=1.0.0.0
Microsoft.Practices.Prism, Version=4.0.0.0
System.Runtime.Serialization, Version=4.0.0.0
Microsoft.Practices.Prism.MefExtensions, Version=4.0.0.0
System.ComponentModel.Composition, Version=4.0.0.0
PresentationCore, Version=4.0.0.0
DevExpress.Xpf.Core.v14.1, Version=14.1.11.0
Samba.Services, Version=1.0.0.0
Samba.Presentation.Services, Version=1.0.0.0
System.Windows.Forms, Version=4.0.0.0
System.Drawing, Version=4.0.0.0
Stateless, Version=1.0.0.0
Samba.Persistance, Version=1.0.0.0
PropertyTools, Version=2012.4.14.1
Samba.Localization, Version=1.0.0.0
ReachFramework, Version=4.0.0.0
Samba.Infrastructure.Data, Version=1.0.0.0
EntityFramework, Version=6.0.0.0
FluentValidation, Version=3.4.0.0
Omu.ValueInjecter, Version=2.3.0.0
Microsoft.Practices.ServiceLocation, Version=1.0.0.0
Microsoft.CSharp, Version=4.0.0.0

-----------------------------

[System Info]

Operating System
-Microsoft Windows 10 Home
--CodeSet = 1252
--CSDVersion = 
--CurrentTimeZone = -240
--FreePhysicalMemory = 1120788
--OSArchitecture = 64-bit
--OSLanguage = 1033
--ServicePackMajorVersion = 0
--ServicePackMinorVersion = 0
--Version = 10.0.10586

Machine
-BBC-REG02
--Manufacturer = Dell Inc.
--Model = Inspiron 3050
--TotalPhysicalMemory = 2024558592
--UserName = BBC-REG02\bigbitez

-----------------------------

Jesse · July 25, 2016, 4:08pm

You have a ticket lister widget setup wrong somewhere. Its sayimg a value cannot be null for it.

antasp3136 · July 25, 2016, 6:01pm

format:

[LAYOUT]
<T>{TICKET TAG:Ticket Type} Ticket
<L00>Date:{TICKET DATE}
<L00>Time:{TICKET TIME}
<L00>Customer:{ENTITY NAME:Customer}
<L00>Table:{ENTITY NAME:Customer Number}
<L00>Ticket No:{TICKET NO}
<L00>Ticket Type:{TICKET TAG:Ticket Type}
<F>-
<F>-
{ORDERS}

[ORDERS]
<L00>- {QUANTITY} {NAME}
{ORDER TAGS}

[ORDERS:Void]
<J00>- {QUANTITY} {NAME}|**Void**
{ORDER TAGS}

[ORDER TAGS]
-- Format for order tags
<L00>     * {ORDER TAG NAME}

antasp3136 · July 25, 2016, 6:03pm

Thats the only ticket lister widget im using.

antasp3136 · July 26, 2016, 1:26pm

Anybody have any ideas where this is coming from? ive gone through the settings of the widget and I dont see anything that is showing as null that would cause this…

emre · July 26, 2016, 1:44pm

That probably happens if you click on display ticket button while it refreshing / updating the ticket lister. I added something to prevent this for next update. (.61)

antasp3136 · August 9, 2016, 4:41pm

So not sure if this helps but i finally got some feedback from the user that this keeps happening to. They said that when they select a ticket from the widget screen and choose display ticket thats when the error value cannot be null pops up. It can happen a few times in a row.

antasp3136 · August 9, 2016, 5:00pm

Is there a way to create a refresh ticket list button for now to keep the errors from happening so that I can have the user manually refresh the ticket lister widget and not have that error occur?

emre · August 10, 2016, 7:32am

How do you refresh ticket lister atm? When message server setup correctly lister should refresh automatically without additional refreshing setup.

antasp3136 · August 10, 2016, 9:04am

Currently I have the ticket Lister widget auto refresh every minute… But I guess when the user selects a ticket and clicks the display ticket button when that auto refresh happens he gets that error. Was just wondering if there was a work around to have a manual way to refresh to keep that error from happening till the fix is released.

Jesse · August 10, 2016, 1:34pm

So your not using message server to refresh? You shouldn’t need to set the auto refresh interval.

antasp3136 · August 10, 2016, 2:04pm

im using the message server yes… but i have the auto refresh on the ticket lister checked should i just uncheck this?

QMcKay · August 10, 2016, 2:40pm

Leave Auto Refresh CHECKED.

Set the Interval to 0 … then it will refresh based on events generated by the message server.

antasp3136 · August 10, 2016, 2:57pm

Ill give that a shot… I had it set to 0 before and it seemed to still cause issues… come to think of it i think i changed the auto refresh interval because when i had it set to 0 i was having an issues with scrolling when there were multiple tickets. Scrolling seemed to stick every time it refreshed to I increased this and it then allowed me to scroll. Just some strange quirks with the ticket lister.