Set breakpoints in both methods and verify if fpidiagramviewobject, cutToolStripMenuItem and diagram are set.

Could you copy the stack trace here?

The following is the stack Trace:

System.ArgumentNullException was unhandled
  Message="Value cannot be null.\r\nParameter name: value"
  Source="mscorlib"
  ParamName="value"
  StackTrace:
      at System.Collections.CollectionBase.OnValidate(Object value)
      at System.Collections.CollectionBase.System.Collections.IList.set_Item(Int32 index, Object value)
      at MindFusion.Diagramming.DiagramItemCollection.set_Item(Int32 index, DiagramItem value)
      at MindFusion.Diagramming.Diagram.CopySelection(Diagram source, Boolean unconnectedLinks, Boolean copyGroups)
      at MindFusion.Diagramming.WinForms.DiagramView.CopyToClipboard2(Boolean persist, Boolean groups)
      at MindFusion.Diagramming.WinForms.DiagramView.CutToClipboard(Boolean copy, Boolean groups)
      at MindFusion.Diagramming.WinForms.DiagramView.CutToClipboard(Boolean copy)
      at WB.Pariksha.FPI.FPIEditorControl.OnCutToolStripMenuItemClick(Object sender, EventArgs e) in D:\users\balaji G\CVS-WD\Pariksha\src\WB.Pariksha.FPI\FPIEditorControl.cs:line 301
      at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
      at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)
      at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
      at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
      at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
      at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
      at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
      at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea)
      at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
      at System.Windows.Forms.Control.WndProc(Message& m)
      at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
      at System.Windows.Forms.ToolStrip.WndProc(Message& m)
      at System.Windows.Forms.ToolStripDropDown.WndProc(Message& m)
      at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
      at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
      at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
      at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
      at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNat
iveMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
      at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
      at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
      at System.Windows.Forms.Application.Run(Form mainForm)
      at FPITestApplication.Program.Main() in D:\users\balaji G\CVS-WD\Pariksha\src\TestApplications\FPITestApplication\Program.cs:line 17
      at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
      at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
      at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
      at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
      at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
      at System.Threading.ThreadHelper.ThreadStart()

- Balaji

Hi,

I am using a Microform which takes in a string. I need to cut this item. When I try to cut it, the above exception is thrown. We create an XML out of the flowchart, the interpretation of the microform is as follows in out application:

<Helpline Comment="Test"/>

Where Helpline is the name that we are using for the Microform

Hi,

   Miroform is a shapenode.. I am setting the mindfusion shapenodes only..

Okay, you've derived from ShapeNode and set the Shape to Microform, but that's still a custom node class. You must either override the virtual DiagramItem Clone(bool clipboard) method, or implement a copy constructor for clipboard operations to work correctly.

Stoyan

Additionally to copying their values in the copy constructor, you must implement serialization for your custom properties by overriding the SaveTo and LoadFrom methods of DiagramItem.

I hope that helps,
Stoyan