[Bug-glpk] Doesn't Solve A Simple Problem

[Boyko Aleksey]

Dear Sirs,

I tried solving a simple problem using GLPK on a MS 
Visual Studio 6. I attached the code itself to the e-mail - the lines where 
I use you library is in the Filter() function.

 

The rest of the code is rather sloppy because 
of the time limits but it forms correct matrices which I put into an LPX 
structure. In the enclosed example I try solving a simple problem of 
minimizing

 

Z=x3+x4

 

With the the variables constrained as 
follows:

x1+00+x3+00<=10

00+x2+00+x4<=10

-x1+00+x3+00<=-10

00-x2+00+x4<=-10

00+00-x3+00<=0

00+00+00-x4<=0

 

And the output is usually 

      0:   
objval =  0.000000000e+000   infeas =  1.000000000e+000 
(0)
PROBLEM HAS NO FEASIBLE SOLUTION

 

Here's as much as I got so 
far.

Dear Sirs,

I tried solving a simple problem using GLPK on a MS Visual Studio 6. I attached the code itself to the e-mail - the lines where I use you library is in the Filter() function.

 

The rest of the code is rather sloppy because of the time limits but it forms correct matrices which I put into an LPX structure. In the enclosed example I try solving a simple problem of minimizing

 

Z=x3+x4

 

With the the variables constrained as follows:

x1+00+x3+00<=10

00+x2+00+x4<=10

-x1+00+x3+00<=-10

00-x2+00+x4<=-10

00+00-x3+00<=0

00+00+00-x4<=0

 

And the output is usually

      0:   objval =  0.000000000e+000   infeas =  1.000000000e+000 (0)
PROBLEM HAS NO FEASIBLE SOLUTION

 

Here's as much as I got so far.