asteinh
commented
5 years ago I cannot reproduce this error running the examples. It sounds like the gilc package +gilc is not on your path (anymore), so Matlab tries to access nlpproblem in the gilc class (which does not exist).
Make sure you either don't change directories when running the code (thus, stay in gilc/matlab/examples) or add the folder containing +gilc to your Matlab path (as an absolute path, so you can remove the addpath('../') in the beginning of the example files).
Does this help?
Note that gILC is not developed anymore - have a look at RoFaLT, which is the actively developed follow-up software with extended capabilities.
when i run b_tutorial1.m, error occurs: Class gilc does not have a constant property or static method named 'nlpproblem'。
error gilc/control (line 59) constep = gilc.nlpproblem(2, this.nu, this.na, this.nx, this.nxa, this.ny);
error b_tutorial1 (line 82) [ilc, u_i, ~] = ilc.control(a_i); % Solve the control step for the first trial