-------- Forwarded Message -------- From: Sergey Kuznetsov <[email protected]> To: [email protected] Subject: Problem with GLPK when trying to find value functions Date: Wed, 25 Jul 2012 19:19:39 +0000
Hello, I'm using GLPK to find value functions, it's a family of linear programs with right-hand side as parameter. For instance, I'm constructing 3D integer lattice and at each site (point) I need to find optimal solution using site coordinates as right-hand side (in this case it's 3D vector). I wrote a function that solves the linear program using GLPK. At first it crashed on the second call. I replaced glp_delete_prob() on gpl_erase_prob() and it worked well for [0;3]^3 lattice (and [0;3]^2 lattice). The problems began [0;4]^2 (2D) lattice. I have segmentation fault and it's unusual because in [0;3]^3 I'm solving more programs. OS : Linux Debian, i686; Compiler: GCC 4.7.1 Test instances: 3D: 4 columns, 3 rows; 2D: 3 columns, 2 rows; all the entries (matrix, objective function coeff, right-hand side) are integers. Clearly, the problems begin when I'm setting span of the lattice to 4 (5, 6, etc.). If anybody has any idea how to fix this, please help me. Thanks Sergey Kuznetsov _______________________________________________ Help-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-glpk
