Hello, I have implemented the example in C++<http://ab-initio.mit.edu/wiki/index.php/NLopt_Tutorial#Example_in_C.2B.2B>from ab-initio, and added a few lines to set a local optimization algorithm [nlopt::opt sub_opt(...)] and its stopping criteria.
Everything works fine when solving the example problem using AUGLAG as the main algorithm with LD_MMA or LN_COBYLA as the local algorithm. When I switch to GD_STOGO or GN_CRS2_LM as the local algorithm, however, I get an invalid argument exception. The same exception is thrown when I use GD_MLSL as the main algorithm and LD_MMA as the local algorithm. Has anyone encountered this problem? Thanks, Rory P.S. On a perhaps related note, does anyone know the difference between all the variants of AUGLAG specified in the algorithm enum of nlopt.hpp? (AUGLAG, LN_AUGLAG, LD_AUGLAG, ...) The reference manual<http://ab-initio.mit.edu/wiki/index.php/NLopt_Algorithms#Augmented_Lagrangian_algorithm>talks about AUGALG and AUGLAG_EQ, but I haven't found a reference to the LN_, LD_ variants.
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