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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">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
<a href="https://www.coin-or.org/download/binary/OptimizationSuite/">https://www.coin-or.org/download/binary/OptimizationSuite/</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">and installed the optimization suite 1.7.4.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">I installed it at the default path:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">C:/Program Files (x86)/COIN-OR/1.7.4<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">And in my python script I programmed the following:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red">import rbfopt<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red">import numpy as np<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red"><o:p> </o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red">mypath = 'C:\\Program Files (x86)\\COIN-OR\\1.7.4\\win32-msvc9\\bin'<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red">settings = rbfopt.RbfoptSettings(minlp_solver_path=mypath, nlp_solver_path=mypath)<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red"><o:p> </o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red">def obj_funct(x):<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red"> return x[0]*x[1] - x[2]<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red"><o:p> </o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red">bb = rbfopt.RbfoptUserBlackBox(3, np.array([0] * 3), np.array([10] * 3),<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red"> np.array(['R', 'I', 'R']), obj_funct)<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red">settings = rbfopt.RbfoptSettings(max_evaluations=50)<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red">alg = rbfopt.RbfoptAlgorithm(settings, bb)<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red">val, x, itercount, evalcount, fast_evalcount = alg.optimize()<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red"><o:p> </o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red"><o:p> </o:p></span></i></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Unfortunately, I get an error:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""> File "c:\users\c565785\appdata\local\programs\python\python36\lib\site-packages\rbfopt\rbfopt_aux_problems.py", line 279, in minimize_rbf<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""> raise RuntimeError('Solver ' + 'bonmin' + 'not found')<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">RuntimeError: Solver bonminnot found<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">What is going wrong? Didn’t I provide the correct path?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Thank you in advance for your help.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Warm regards from Switzerland<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Pascal Zeugin<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
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