It is difficult to determine the exact reason for Keil µVision 4 not opening for your device without more information. However, you can try the following steps to troubleshoot the issue:
- Make sure your device meets the system requirements for Keil µVision 4.
- Ensure that you have installed the necessary drivers for your device.
- Try reinstalling Keil µVision 4 and check if it opens properly.
- Check if there are any compatibility issues between Keil µVision 4 and your device's operating system.
- Seek assistance from Keil support or the user community for further guidance regarding this specific issue.