#define NA   0xFFFF

The specified argument does not apply (aka unwired)

Examples:

ex_ArrayMax.nxc, ex_ArrayMean.nxc, ex_ArrayMin.nxc, ex_ArrayOp.nxc, ex_ArraySort.nxc, ex_ArrayStd.nxc, ex_ArraySum.nxc, and ex_ArraySumSqr.nxc.