warning 208: reserved which appears in compiler 2.6 (I also got it several times) is an old warning that was supposed to be removed from the compiler and changed to an error but CompuPhase forgot to remove the reference that still generates it.
In an older compiler (1.8.4) the warning meant:
function uses both "return;" and "return <value>;"
Now, you should get error 078 which means exactly the same. I will post on ITB Compuphase's boards about it.