After opening DyKnow 5.x Monitor or Vision, the Ribbon Bar (which contains the Home, Insert, Authoring, Session, Animation, Monitor, and View tabs) is missing and is replaced by a red X.
The direct cause of this issue is unknown, but several solutions have been found to resolve the issue.
- Switch to Windows Basic theme, reboot the computer, switch back to the Windows Aero or custom theme.
- Reinstall Microsoft.NET 3.5SP1 (How to repair Microsoft.NET 3.5SP1)
- Copy the font 'Microsoft Sans Serif' from a computer that does not have the issue to the affected computer. Fonts are located in C:\Windows\Fonts
- Run System File Checker to find and replace damaged Windows files.
a. Open a command prompt. Type sfc /scannow then press Enter.