1787: Choosing 768 kHz in SS results in compile error.

I am trying to change the sample rate so the FDSP runs at 768 kHz. I have changed the DAC_FS and ADC01_FS registers to 768 kHz, however when I change this setting in SS and 'link-compile-download', I see this error. So is this basic flow not being downloaded to the 1787?

Sidenote: does the FDSP always run at 768 kHz? Or is it some sort of HW accelerator? Just want to be clear on the differences between it and the SDSP.

Thank you

sample rate

1787

sigmastudio

fdsp