How to resolve "not enough input arguments" error

How can I solve this problem? I´ve tryed everything

Answer 1

[Star Strider]

A guess:

[X,iter,erroX,erroF] = newtgen(@FXJV, ... );
                               ↑ ← DENOTES FUNCTION HANDLE 

It is probably necessary to create a function handle representation for ‘FXJF’ to include it as an argument to ‘newtgen’.

I obviously have no way of testing this, so I am posting it as UNTESTED CODE.