GDI Issue

A user recently got this exception:

Top Level Exception
Type: System.NullReferenceException
Message: Object reference not set to an instance of an object.
Source: System.Drawing
Stack Trace: at
System.Drawing.SafeNativeMethods.GdipFillRectangleI(HandleRef graphics,
HandleRef brush, Int32 x, Int32 y, Int32 width, Int32 height)
at System.Drawing.Graphics.FillRectangle(Brush brush, Int32 x, Int32 y,
Int32 width, Int32 height)
at System.Drawing.Graphics.FillRectangle(Brush brush, Rectangle rect)
at _53._4(Graphics , Rectangle )
at ActiproSoftware.SyntaxEditor.EditorView._1(Graphics , Rectangle )
at ActiproSoftware.SyntaxEditor.EditorView.OnRender(PaintEventArgs e)
at ActiproSoftware.WinUICore.UIElement.Render(PaintEventArgs e)
at
ActiproSoftware.WinUICore.UIControl.OnRenderChildElements(PaintEventArgs e)
at ActiproSoftware.WinUICore.UIControl.Render(PaintEventArgs e)
at ActiproSoftware.WinUICore.UIControl._1(PaintEventArgs )
at ActiproSoftware.WinUICore.UIControl.OnPaint(PaintEventArgs e)
at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e,
Int16 layer, Boolean disposeEventArgs)
at System.Windows.Forms.Control.WmPaint(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at ActiproSoftware.SyntaxEditor.SyntaxEditor.WndProc(Message& m)
at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg,
IntPtr wparam, IntPtr lparam)

After getting this exception the editor portion of the SE control was replaced with a big red X.

Any idea on this one? It seems to occur at random times during app usage.

Thanks,

Ashton