Our code works for an indeterminate period of time, but after that time, the call always throws an exception until the server is rebooted. It is not resolved by restarting the IIS website, its app pool, or restarting IIS…...DrawString(text, font, textBrush, new RectangleF(0...Single(n => n.Name.Contains("Watermark"); ((Shape)node.FirstParagraph...