Re: [Help-glpk] spx_simplex: problem has no rows/columns

[xypron]

Hello Sana,

unfortunately you do not mention which JNI library you are using. From the
code it
looks like the one availabe at http://bjoern.dapnet.de/glpk/.

It has not been updated for a while and is not compatible to the current
version
of GLPK.

You can find a current JNI library at
http://glpk-java.sourceforge.net

If you are looking for precompiled Windows binaries, please download WinGLPK 
available at 
http://winglpk.sourceforge.net
It contains GLPK-Java and the latest release of GLPK (4.42).

Have a look at files
doc/glpk.pdf
doc/glpk-java.pdf
examples/java/Gmpl.java

Best regards

Xypron


Sana Jawad wrote:
> 
> Hi,
> 
> I am trying to call a model written in MathProg using GLPK in java. My
> code
> is as follows:
> 
> 
> GlpkSolver solver = *new* GlpkSolver();
> 
> GlpkSolver.*readModel*("C:/Models/my-model.mod","C:/Models/data-file.txt",*
> null);*
> 
> solver.setProbName("Example");
> 
>  solver.printProb("C:/Models/probData.txt");
> 
> solver.simplex();
> 
>  solver.printSol("C:/Models/res.txt");
>  And I get the following output:
> 
> 
> Reading model section from C:/Models/skedx.mod...
> 
> C:/Models/skedx.mod:107: warning: data section ignored
> 
> 107 lines were read
> 
> Reading data section from C:/Models/skedx.txt...
> 
> C:/Models/skedx.txt:93: warning: final NL missing before end of file
> 
> 93 lines were read
> 
> Generating maxshift...
> 
> Generating mb...
> 
> Generating mb1...
> 
> Generating mb2...
> 
> Generating mb3...
> 
> Generating costCalc...
> 
> Generating TotalCost...
> 
> Generating temp2...
> 
> Generating temp3...
> 
> Generating obj...
> 
> Model has been successfully generated
> 
> lpx_write_prob: writing problem data to `C:/Models/probData.txt'...
> 
> *spx_simplex: problem has no rows/columns*
> 
> lpx_print_sol: writing LP problem solution to `C:/Models/res.txt'...
> *The probData and res.txt files have no data in them. However when I
> run this model from gusek or lpsolve i get a proper result.*
> 
> Can anyone please tell what could be the issue here. Thanx in advance.
> 
> Best Regards,
> Sana
> 
> _______________________________________________
> Help-glpk mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/help-glpk
> 
> 
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