User-defined functions cannot be accessed in Mex-file.

[jrfaeder]

The functions are currently written to the Mex file, but they are not called internally and no interface is provided to access them through Matlab. To use in Matlab the functions must be re-created there.

This applies to global functions only. To provide an external interface to local functions would be more complicated.

[lh64]

For network-based simulation, local functions get compiled down to global functions (or sometimes just numbers), so I don't think that's an issue. Any code that fixes the problems with accessing global functions in Mex files I believe will work for local functions too.