Hello,
Note that both CCSv3.3 and RTDX is no longer supported. So there is very little help we can provide on these topics. But here is a hint:
[quote user="zizhong tan"] "Can't enable RTDX as it requires AU1 which is already claimed for profiling or breakpoint(s) "[/quote]
Enabling RTDX will use a hardware resource, the same that the profile clock or an hardware breakpoint would use. There are a limited number of these resources supported on a target. Try looking at your debug session and see if there are some resources you can free up by disabling the clock, HW breakpoints or other related features.
Thanks
ki