I was able to successfully run the RTOS uartecho in CCSv6. I then built a release version in IAR 7.2 and tested that - it also worked. Then ran a "rebuild all" in IAR (rather than just "make") in the debug configuration, and was able to debug the program from that point. There are some issues with the IAR debugger going off into the weeds, but that would be an IAR thing and probably not a subject for this forum.
So thanks for the help, and we can close out this issue.