Originally posted by: PaulBerglund

I just installed CPLEX 12.5 and tried to invoke one of the samples from MATLAB to see if it was working.

I get the error message:

Undefined function or method 'cplexlink125' for input arguments of type 'double'.

There is a file cplexlink125.mexw32 which is in my path. Is this the file that was being looked for, and if so, why couldn't it be found?

Paul Berglund
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Originally posted by: SystemAdmin

Does it help to add the folder containing cplexlink125.mexw32 to the environment variables PATH and/or MATLABPATH?
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Originally posted by: PaulBerglund

OK, I figured it out.

There were two different problems. One was that I had carelessly installed the 32-bit cplex when I needed the 64-bit.

The other was that I needed to add the directory with cplex's matlab source to my path.

I did that, and the examples ran fine.

Paul Berglund
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Originally posted by: Huy Doan

Hi Paul,

Could you tell me how can you fix the problem "Undefined function or method 'cplexlink125' for input arguments of type 'double'"?

I already run the following code in matlab:

path(path,'C:\Program Files (x86)\IBM\ILOG\CPLEX_Studio_Preview125\cplex\matlab\x86_win32')

path(path,'C:\Program Files (x86)\IBM\ILOG\CPLEX_Studio_Preview125\cplex\examples\src\matlab')

and then I try the example cplexlpex but it still appears that error.

Thanks,

Huy

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Are you sure you need 32bit CPLEX? If your OS or matlab version is 64bit then you may need 64bit CPLEX.

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Originally posted by: Huy Doan

I only have the 32bit CPLEX. Does it mean that I cannot use my CPLEX on the 64bit OS or Matlab?

 

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Like Paul said a few posts above: The versions of matlab and CPLEX must match. So for 64bit matlab you need 64bit CPLEX and for 32bit matlab you need 32bit CPLEX.

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