I have VDSP++ 5.0 Update9 and my target board with ADSP21489 (KSWZENGB 1869352.1 0.2 #1021).
CLKIN = 40 MHz.
The overflowed stack is happened.
When I worked with my target board with ADSP21375 in VDSP++ 5.0 Update7 my program worked ok.
I create for you a special projects when this problem is happened