Debugging 64 bit C++ source

Fortran and C++ source intermingled is able to be debugged and stepped into / between under 32 bit.

In 64 bit, an assembly listing is output instead of the C++ source code.

I can see from the release notes that scc does not support the /debug flag. is there any possibility of this scenario being supported?

There is no possibility of it being supported at the moment.