Okey, Dokey, I have this working.

So, in addition to my earlier method/technique presented to work with STM32CubeMX,

I now present Semihosting with System Workbench.

I added a copule of lines to main.c, see the attached file and look for code commented with rtt.

In Debug Configurations I added this to the Startup Tab:

monitor arm semihosting enable

and in Project, Properties, C/C++ Build, Settings, MCU GCC Linker, Miscellaneous, Linker flags,

-specs=nosys.specs -specs=nano.specs -specs=rdimon.specs -lc -lrdimon

In summary, the code I am running is FreeRTOS, with all LEDs blinking using seperate threads and USB VCP operating while also doing semihosting, with much of the code coming out of STM32CubeMX.

I hope this helps others who, like me, cannot afford the major toolchains and the Lite versions are too Lite as to be ineffective.