HELP: Error in 'Optknock' using 'Ibm Cplex' solver (academic)

[alvipa]

Hello, 

I'm using in Linux OS Matlab R2016b (64 bits) and IBM Cplex solver (academic version) and I get this runtime error from CPLEX when I try to launch optknock (I've tried FBA and FVA and I don't get any errors in that case). 

load('model.mat');
changeCobraSolver('ibm_cplex', 'all');

 

%% Select reactions to be explorer 
[transRxns,nonTransRxns] = findTransRxns(model,true);
[tmp,ATPMnumber] = ismember(rxn_atpm, nonTransRxns);
[tmp,BioMassnumber] = ismember(rxn_biomass, nonTransRxns);
nonTransRxnsLength = length(nonTransRxns);

 

%% Candidate reactions to be knocked out
selectedRxns = {nonTransRxns{[1:ATPMnumber-1,ATPMnumber+1:BioMassnumber-1,BioMassnumber+1:nonTransRxnsLength]}}:

 

%% Optnock options
options.targetRxn = rxn_target;
options.vMax = 1000;
options.numDel = 3;
options.numDelSense = 'L';
constrOpt.rxnList = {rxn_biomass};
constrOpt.values = [0.2];
constrOpt.sense = 'GE';

 

%% Launch Optknock
optKnockSol = OptKnock(model, selectedRxns, options, constrOpt);

 

>> optKnockSol = OptKnock(model, selectedRxns, options, constrOpt);
   0
Error using cplexlink1280
CPLEX Error  1003: Bad argument to Callable Library routine.
Error in Cplex/subsasgn
Error in solveCobraMILP (line 326)
        cplexlp.Param.output.writelevel.Cur = cobraParams.printLevel;
Error in OptKnock (line 207)
    optKnockSol = solveCobraMILP(bilevelMILPproblem,'printLevel',verbFlag); 

I have no idea what's going on. I have printed on screen the value of the 'printLevel' parameter and I get the following:

>> cplexlp.Param.output.writelevel.Cur = cobraParams.printLevel
     
ans=
     
   Cplex handle
     
   Properties:
      Model: [1x1 struct]
      Param: [1x1 struct]
      DisplayFunc: @disp
     

Any help is very appreciated

Thank in advance!

[Thomas Pfau]

Hi,

Did you change the solveCobraMILP file? Because the referenced line line 325 on the github repository, and for all I can see this should work according to the api (and does work in the tests).

Best

Thomas

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