Even in the latest release uv4 crashes constantly, it seems to me none of the problems report directly to Keil or via this forum have been resolved.
3 machines, ulink2 and ulink me, 3 different targets all with one common link, uv4.
Only in desktop software could you get away with this...
It stinks.
If you modify source file(s) whilst the target is running, then attempt to stop the target in order to build, more often than not it will crash. On occasion the the taget will stop but the screen remain in debug mode, but you can build using F7, it then normally crashes.