Arduino MEGA with RTOS
Well, DUMBO (that would be me) found the problem, and it was a real bonehead error.

When I applied the stand-alone code to the RTOS environment, I did not reallocate pin assignments, so there were multiple I/O events writing to the same port that was using the Test LEDs.

I knew that FreeRTOS couldn't be that bad, as if the I/O went to the incorrect pins, the code would be useless.

So, don't take shortcuts, even if you're not ready to complete all segments of the project. Check for duplicate definitions or they will bite you in the ass.......