[RBFOpt] RBFOPT

[Pascal Zeugin]

Hi,

first and foremost I would like to thank you for sharing such a cool library, you guys are awesome! I installed rbfopt recently. The installation worked well but I always get a runtime error when running the example script as bonmin solver is not found. Of course I have downloaded the binaries from https://www.coin-or.org/download/binary/OptimizationSuite/
and installed the optimization suite 1.7.4.

I installed it at the default path:
C:/Program Files (x86)/COIN-OR/1.7.4

And in my python script I programmed the following:

import rbfopt
import numpy as np

mypath = 'C:\\Program Files (x86)\\COIN-OR\\1.7.4\\win32-msvc9\\bin'
settings = rbfopt.RbfoptSettings(minlp_solver_path=mypath, nlp_solver_path=mypath)

def obj_funct(x):
  return x[0]*x[1] - x[2]

bb = rbfopt.RbfoptUserBlackBox(3, np.array([0] * 3), np.array([10] * 3),
                                np.array(['R', 'I', 'R']), obj_funct)
settings = rbfopt.RbfoptSettings(max_evaluations=50)
alg = rbfopt.RbfoptAlgorithm(settings, bb)
val, x, itercount, evalcount, fast_evalcount = alg.optimize()


Unfortunately, I get an error:


  File "c:\users\c565785\appdata\local\programs\python\python36\lib\site-packages\rbfopt\rbfopt_aux_problems.py", line 279, in minimize_rbf
    raise RuntimeError('Solver ' + 'bonmin' + 'not found')

RuntimeError: Solver bonminnot found

What is going wrong? Didn't I provide the correct path?

Thank you in advance for your help.

Warm regards from Switzerland
Pascal Zeugin

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