Re: Re[Help-glpk] garding speeding up MIPs by providing Initial solutions

2009-04-06 Thread Andrew Makhorin
Thanks for your reply. Please see my reply in the lines. I've tested your model. In fact, it is not hard for glpk 4.37 and can be solved in several minutes. However, it is hard enough to be solved faster. The model looks like a pseudo-boolean problem (more precisely, like a satisfiability

Re: [Help-glpk] problem with glpsol

2009-04-06 Thread Andrew Makhorin
Here is the cplex lp file and the mps file. Thanks. Wrong results appear, because the problem is badly scaled. This is caused by two tiny constraint coefficients: C036 R033 -5.16198E-27 R034 -0.079105507 C036 R039 -0.092756701 R040 -5.51167E-27 To

[Help-glpk] Obtain the variables values in a GLPK 4.8 Java Interface

2009-04-06 Thread Sylvain Fournier
Hello, I am currently using GLPK with the Java interface developped and made available in the following website: http://bjoern.dapnet.de/glpk/ When I solve a LP and I want to retrieve the values of the solution (using getColPrim() and getColDual(), for example), these values (they are of type