Value cross detection gives error on compilation

If I include a Value Cross Detection block in my schematic, SigmaStudio gives an error when trying to compile.

There also seem to be two identical Value Cross Detection algorithms that can be added.

I am currently using SigmaStudio 3.12.4 beta with an ADAU176x eval board. The error messages can be seen

in the figure below:

The identical algoritms:

Everything else works as far as I can tell. I am trying to implement a zero crossing rate to use for a

VAD. The schematic shown in the figures is a basic example from the wiki.

Thank you