Saving a form with RadGridView produces the following error at design time: Code generation for property "PrintCellPaint" failed. We isolated the following steps which reproduce the issue: 1. Drag and drop RadPageView on the form. Add 2 pages. 2. Add a RadGridView to one of the pages. 3. Saved and opened the form. 4. Select the other page and save the form. case #1: If the grid is empty - Code generation for property 'PrintCellPaint' failed. Error was: 'Object does not match type.' case #2: If the grid is data bound - Code generation for property 'PropertyChanging' failed. Error was: 'Object does not match type.' The same errors if you use RadDock with tabbed documents.