title: gurobi is installed but Matlab doesn't recognize it
body: <p>Matlab16, Linux 16.04, Gurobi 6.5.2</p>
  
  <p>I want to use Cobra toolobox on Matlab, so I installed it and Gurobi as asked too.
  But when I try this code (as explain in an research article : What is FBA ? Orth, Palsson) I got an error </p>
  
  <p>The code</p>
  
  <p><code>model = readCbModel('ecoli_core_model.xml')
  optimizeCbModel(model)</code></p>
  
  <p>The error </p>
  
  <p>`Error using solveCobraLP (line 107)
  No solver found.  call changeCobraSolver(solverName)</p>
  
  <p>Error in optimizeCbModel (line 213)
      solution = solveCobraLP(LPproblem);
  `</p>
  
  <p>In changeCobraSolver.m, it said that Gurobi is a right solver. Apparently, Matlab and Gurobi are not connected.</p>
  
  <p>I added <code>.../gurobi652/linux64/matlab</code> to the path and I tried (as explain here <a href="http://www.gurobi.com/documentation/6.5/refman/matlab_setting_up_the_guro.html" rel="nofollow noreferrer">http://www.gurobi.com/documentation/6.5/refman/matlab_setting_up_the_guro.html</a>) a function. I worked.</p>
  
  <p>I tried to install Gurobi Mex (here <a href="http://www.convexoptimization.com/wikimization/index.php/Gurobi_Mex:_A_MATLAB_interface_for_Gurobi" rel="nofollow noreferrer">http://www.convexoptimization.com/wikimization/index.php/Gurobi_Mex:_A_MATLAB_interface_for_Gurobi</a>) but I don't find Gurobi_mex.c </p>
  
  <p>Yesterday <code>optimizeCbModel</code> worked but I don't know what I did and what changed.</p>