Problem with DSP/BIOS SIO example, can anyone help ?

When running the example in C:\CCStudio_v3.3\bios_5_33_03\packages\ti\bios\examples\advanced\streaming

using the TMS320F28355 experimenter kit, I encouter the following:

Compiles cleanly.

After “go main”  BIOS hangs at program count 008DD0

008DCE      UTL_halt, SYS_EXITFXN:

008DCE 76408D7F    LCR        _HWI_disable

008DD0 6F00        SB         0,UNC                            ß hangs here

I further investigated this by creating my own project that calls a “do nothing task”, and I found that simply adding a DPI – pipe driver to the static BIOS configuration causes identical behaviour hanging at the same program count.

Can anyone advise ?