Ran the MQX installer which warned that not all debug libraries are loaded. I followed instructions to load and recompile the MQX 3.8 core libraries. First problem:
When trying to load the _bsp files, the error message "Some projects were hidden because they exist in the workspace directory". Received the same error for the _usb_device files. All of the others loaded.
I then followed the ordering proscribed for recompiling and now the bsp_twrmcf51jf : Debug and cdc_vcom_twrmcf51jf : Int Flash Debug files have the error flag on them and all of the rest of the files have the yellow "warning" icon attached.
How to proceed?