I think I may have reported this before, but I can't find the post. One or two users have reported the following exception when a ShapeNode is drawing text. I cannot reproduce the problem. Any ideas why it might be happening?
DavidL

Message               : Parameter is not valid.
Source                 : System.Drawing
Stack Trace           :
   at System.Drawing.Graphics.CheckErrorStatus(Int32 status)
   at System.Drawing.Graphics.DrawString(String s, Font font, Brush brush, RectangleF layoutRectangle, StringFormat format)
   at MindFusion.Drawing.GdiGraphics.DrawString(String s, Font font, Brush brush, RectangleF layoutRectangle, StringFormat format)
   at MindFusion.Diagramming.ShapeNode.c2fa8ddcea66de378dd2b3effa46b7080(c48b3fdd1c915
6f9901cdeee6911ffe6e c709ceac15c918fc392a6d51df8089edc)
   at MindFusion.Diagramming.ShapeNode.caf4474dadf19b15a82502e8142e562c6(IGraphics c6c92d7b0a001e45905428290158c2b17, RectangleF ce628c69113f2f8808f36872bc2738966, Boolean c9ad6e71c98bc3301de210ef60cbebaf6, Brush cfe6c9db5410bcfcba1e5ef84f3723807, Pen c70516b352fa4534e29f3eea90837a640, RenderOptions ccf51cc94bd4a2fb3622e3aa9f3d15511)
   at MindFusion.Diagramming.ShapeNode.DrawLocal(IGraphics graphics, RenderOptions options)
   at MindFusion.Diagramming.DiagramNode.Draw(IGraphics graphics, RenderOptions options)
   at MindFusion.Diagramming.Diagram.c36c1fca3b267b5451f759c0295c2805a(IGraphics c6c92d7b0a001e45905428290158c2b17, DiagramItem ca6e827fc07fcc9e1bcb0b1fce21834e2, Boolean c1e4be7b4a08ee92d4d8160fe7cdf183b, Nullable`1 cba5fe945e4bbdbc1273efda679d7f4fe)
   at MindFusion.Diagramming.Diagram.c85c9fb5f1477600f0b8e47a76b97a8a7(IGraphics c6c92d7b0a001e45905428290158c2b17, RectangleF cba5fe945e4bbdbc1273efda679d7f4fe, Boolean cee688e3e023124b817ff45ba0aee6409)
   at MindFusion.Diagramming.Diagram.Draw(IGraphics graphics, RenderOptions options, RectangleF clipRect, Boolean backBuffer)
   at MindFusion.Diagramming.WinForms.DiagramView.cbdcbabce8bb735d287c1c0e3584d6497(IG
raphics c6c92d7b0a001e45905428290158c2b17, RectangleF c9261db5050cfcb2acba21bce194905d7, Boolean cee688e3e023124b817ff45ba0aee6409)
   at MindFusion.Diagramming.WinForms.DiagramView.OnPaint(PaintEventArgs pe)
   at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)
   at System.Windows.Forms.Control.WmPaint(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at MindFusion.Common.WinForms.TouchControl.WndProc(Message& m)
   at MindFusion.Diagramming.WinForms.DiagramView.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

OK, I will upgrade to 7.0.2 and hopefully, this problem will go away. Do you send out emails for minor releases such as 7.0.1 and 7.0.2?

DavidL