Originally posted by: Khaled Saeed

Dear all, 

I am trying to invoke the cplex tuning tool. Unfortunately, I always got this error

Error using cplexlink1263
(null)

Error in Cplex/tuneParam (line 2326)

Error in Cplex/subsref (line 3969)

and this is the method i use to call the tuning tool 

% Build model
Cplex = Cplex('bus.lp');
Cplex.Model.obj=S2;
Cplex.Model.sense='minimize';
Cplex.Model.lb=lb;
Cplex.Model.ub=ub;
Cplex.Model.ctype=ctype;
Cplex.Model.A=A;
Cplex.Model.rhs=rhs;
Cplex.Model.lhs =lhs;

Cplex.writeModel('bus.lp')

Cplex.Param.tune.display.Cur=2;

Cplex.Param.tune.timelimit.Cur=50;
Cplex.Param.tune.repeat.Cur=1;

Cplex.tuneParam();

Do you get a similar error if you invoke Cplex.solve() instead of Cplex.tuneParam()?

Originally posted by: Khaled Saeed

@DanielJunglas 548c249b-bb6b-42f6-99b8-f0376c80829e thanks for your reply.
 No there is no errors and I can solve the model and get the results. 

Originally posted by: Khaled Saeed

Dear@DanielJunglas 548c249b-bb6b-42f6-99b8-f0376c80829e,

I hope you have any useful guides to solve this problem. 

I'm afraid you have hit on a bug in CPLEX matlab connector. Can you please try invoking the tuner like this:

   cplex.tuneParam({cplex.Param.read.datacheck,...
                    cplex.Param.workmem,...
                    cplex.Param.workdir});

The parameters passed as parameters to the function are parameters that are not considered by the tuner. Here I pass parameters that the tuner does not consider anyway, so this does not change behavior of the tuner.

Originally posted by: Khaled Saeed

Thanks for your reply.

I have tried your suggestion and I guess the tuning tool works but later I got a Matlab error.
I've attached the error and Matlab window in the photos.

Also, I don't know but it might be useful information, I am using Matlab 2014a on Windows 10 Pro x64 and Cplex  12.6.3.

Yeah, there is another bug that causes this crash :-( It seems the tuning tool is not usable.

You can use the tuning tool in the interactive optimizer instead. To do this, use Cplex.writeModel('model.sav.gz') to export the model to a file, then in the interactive optimizer do

CPLEX> read model.sav.gz
CPLEX> tune

A little cumbersome but I'm afraid this is the only way to tune for your model.

Originally posted by: RWunderling

The issue will be fixed in the next release.