Problems with funcs.iterfunc

[CaliShulz]

The description of funcs.iterfunc reports:

% funcs.iterfunc (optional)
%
% An additional callback routine that is called once per algorithm
% iteration. It takes three inputs: the first is the current iteration
% of the algorithm, the second is the current value of the objective,
% and the third is a structure containing fields x, inf_pr, inf_du, mu,
% d_norm, regularization_size, alpha_du, alpha_pr, and ls_trials. This
% function should always return true unless you want IPOPT to terminate
% prematurely for whatever reason. If you would like to use the third
% input to iterfunc along with auxdata functionality, you will need to
% modify the appropriate section of ipopt_auxdata.m.

however auxdata struct does not contain the value of the current solution x.
Matlab output is

auxdata =

struct with fields:

             inf_pr: 0
             inf_du: 0.1052
                 mu: 1
             d_norm: 0
regularization_size: 0
           alpha_du: 0
           alpha_pr: 0
          ls_trials: 0