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Sep 01, 2018 at 05:55 PM

Getting error while generating report "Object reference not set to an instance of an object."

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We are generating Crystal report run time error like "Object reference not set to an instance of an object."

while debugging more get to know there is some error related to Crystal report itself please have a look more detail about error:

   at SAPBusinessObjects.WPF.Viewer.ReportAlbum.OnCreateNewDocumentViewComplete(CreateNewDocumentArgs args)
   at SAPBusinessObjects.WPF.Viewer.DelegateMarshaler.<>c__DisplayClass6_0`1.<Invoke>b__0(Object <state>)
   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.DispatcherOperation.InvokeImpl()
   at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
   at MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(Object obj)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at MS.Internal.CulturePreservingExecutionContext.Run(CulturePreservingExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Windows.Threading.DispatcherOperation.Invoke()
   at System.Windows.Threading.Dispatcher.ProcessQueue()
   at System.Windows.Threading.Dispatcher.WndProcHook(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.Window.ShowHelper(Object booleanBox)
   at System.Windows.Window.Show()
   at System.Windows.Window.ShowDialog()
   at RetailSoft.ViewModel.LoginViewModel.LoginCommandReciever()


Here is the IDE detail we are using for report :

Microsoft Visual Studio Community 2017 
Version 15.8.2
VisualStudio.15.Release/15.8.2+28010.2016
Microsoft .NET Framework
Version 4.7.03056
Installed Version: Community
Visual C++ 2017   00369-60000-00001-AA346
Microsoft Visual C++ 2017
Application Insights Tools for Visual Studio Package   8.13.10627.1
Application Insights Tools for Visual Studio
ASP.NET and Web Tools 2017   15.8.05077.0
ASP.NET and Web Tools 2017
ASP.NET Core Razor Language Services   15.8.31590
Provides languages services for ASP.NET Core Razor.
ASP.NET Web Frameworks and Tools 2017   5.2.60618.0
For additional information, visit https://www.asp.net/
C# Tools   2.9.0-beta8-63208-01
C# components used in the IDE. Depending on your project type and settings, a different version of the compiler may be used.
Common Azure Tools   1.10
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.
Crystal Reports for .NET Framework   
Crystal Reports for .NET Framework
Microsoft Continuous Delivery Tools for Visual Studio   0.4
Simplifying the configuration of continuous build integration and continuous build delivery from within the Visual Studio IDE.
Microsoft JVM Debugger   1.0
Provides support for connecting the Visual Studio debugger to JDWP compatible Java Virtual Machines
Microsoft Library Manager   1.0
Install client-side libraries easily to any web project
Microsoft MI-Based Debugger   1.0
Provides support for connecting Visual Studio to MI compatible debuggers
Microsoft Visual C++ Wizards   1.0
Microsoft Visual C++ Wizards
Microsoft Visual Studio Tools for Containers   1.1
Develop, run, validate your ASP.NET Core applications in the target environment. F5 your application directly into a container with debugging, or CTRL + F5 to edit & refresh your app without having to rebuild the container.
Microsoft Visual Studio VC Package   1.0
Microsoft Visual Studio VC Package
MLGen Package Extension   1.0
MLGen Package Visual Studio Extension Detailed Info
NuGet Package Manager   4.6.0
NuGet Package Manager in Visual Studio. For more information about NuGet, visit http://docs.nuget.org/.
ProjectServicesPackage Extension   1.0
ProjectServicesPackage Visual Studio Extension Detailed Info
ResourcePackage Extension   1.0
ResourcePackage Visual Studio Extension Detailed Info
ResourcePackage Extension   1.0
ResourcePackage Visual Studio Extension Detailed Info
SQL Server Data Tools   15.1.61808.07020
Microsoft SQL Server Data Tools
Test Adapter for Boost.Test   1.0
Enables Visual Studio's testing tools with unit tests written for Boost.Test.  The use terms and Third Party Notices are available in the extension installation directory.
Test Adapter for Google Test   1.0
Enables Visual Studio's testing tools with unit tests written for Google Test.  The use terms and Third Party Notices are available in the extension installation directory.
TypeScript Tools   15.8.20801.2001
TypeScript Tools for Microsoft Visual Studio
Visual Basic Tools   2.9.0-beta8-63208-01
Visual Basic components used in the IDE. Depending on your project type and settings, a different version of the compiler may be used.
Visual F# Tools 10.2 for F# 4.5   15.8.0.0.  Commit Hash: c55dd2c3d618eb93a8d16e503947342b1fa93556.
Microsoft Visual F# Tools 10.2 for F# 4.5
Visual Studio Code Debug Adapter Host Package   1.0
Interop layer for hosting Visual Studio Code debug adapters in Visual Studio
Visual Studio Tools for CMake   1.0
Visual Studio Tools for CMake
Visual Studio Tools for Containers   1.0
Visual Studio Tools for Containers
Visual Studio Tools for Universal Windows Apps   15.0.28010.00
The Visual Studio Tools for Universal Windows apps allow you to build a single universal app experience that can reach every device running Windows 10: phone, tablet, PC, and more. It includes the Microsoft Windows 10 Software Development Kit.


let us know what is going wrong here?

Note : report is generating successfully but once report generated it is giving error like what we mention in above if we are generating second tim report then application is going to break mode and application crash.