Undefine function or variable in matlab function block

I have a masked 'matlab function' with a parameter in the input area of the script as shown:

 function BlkHistoVector = CreateBlockHistogram(LeftBin, Magnitude1, Magnitude2, p)

The "p" is defined in Edit Data as a parameter and all works well in my small model (attached as 'Working.slx') with just the masked block and some constants to define signals. I can change the value of p by double clicking the mask and get the 'Function Block Parameter' window to pop up and ask for the value of p, which I can change, rerun and the output vector changes size accordingly.

When I copy/paste my 'working' block into my much larger program (also attached), I get "Undefined function or variable 'p'." Block is at DLib/HogSVM/HoGCalculation/EachPixel/HoGEnabledSS/CreateBlockHistogramVectorEE in the heirarchy.

what broke? I notice on the unworking version all the input signal dimensions are 1x1 as opposed to just double.