Getting IPOPT exitflags with casadi.nlpsol class object

[Shyam Srinivasan]

Hi

I am wondering whether it is possible to get exitflags (in MATLAB) after IPOPT finishes with the solution to an NLP (in addition to the on screen message delivered by it).

I noticed this question from 2 years ago answering a similar question (https://groups.google.com/forum/#!searchin/casadi-users/ipopt$20exit|sort:relevance/casadi-users/uL9x-pDQFb4/EWWZ6_4YBgAJ) 

I tried following the answer that was given i.e., to use the getStats() method of the solver object, but got an error. 

This is the code snippet:

estprob = struct('x',var,'f',obj,'g',cons,'p',par);

options.warn_initial_bounds = 1;

options.ipopt.fixed_variable_treatment = 'make_constraint';

options.ipopt.max_iter = 5000;

solver = casadi.nlpsol('solver','ipopt',estprob,options);

sol = solver('x0',x0,'p',par_val,'lbx',lb,'ubx',ub,'lbg',lbg,'ubg',ubg);

This code solves my problem. However, calling solver.getStats() gets me the following error:

Error using subsref

No appropriate method, property, or field getStats for class casadi.Function.

Error in casadi.Function/subsref (line 1443)

        [varargout{1:nargout}] = builtin('subsref',self,s);

I also could not find the getStats method associated with the solver object when I typed methods(solver).

Any help is appreciated.

Thank you

[Joris Gillis]

Modern syntax is .stats as opposed to .getStats