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[Bug-glpk] Re: [Help-glpk] Why GLPK crash when I try to solve this probl
[Bug-glpk] Re: [Help-glpk] Why GLPK crash when I try to solve this problem?
Fri, 15 May 2009 15:27:27 +0300
> Hi, I'm new to GLPK and I need help. I'm trying to solve a problem with
> GLPK (or, at least, to write LP problem) but the solver crashes and I
> don't know why...
> I'll attach you mod and dat file:
> http://www.nabble.com/file/p23556429/FP.mod FP.mod
> http://www.nabble.com/file/p23556429/zonaE.dat zonaE.dat
> I'm waiting for your answers...thank you!
> PS: I'm using GLPK version 4.34
Most likely it is a bug in the C run-time library, *not* in glpk.
Which compiler did you use to compile glpk? For example, Borland C/C++
run-time library crashes at exit from the main program (segmentation
fault) if the memory dynamically allocated by the program exceeds 64 Mb.
I run your model successfully under both GNU/Linux and Cygwin:
GLPSOL: GLPK LP/MIP Solver 4.39
Reading model section from FP.mod...
FP.mod:739: warning: unexpected end of file; missing end statement inserted
739 lines were read
Reading data section from zonaE.dat...
zonaE.dat:271: warning: final NL missing before end of file
zonaE.dat:271: warning: unexpected end of file; missing end statement inserted
271 lines were read
Model has been successfully generated
glp_mpl_build_prob: row fp; constant term 130 ignored
glp_simplex: original LP has 7568 rows, 7735 columns, 304367 non-zeros
glp_simplex: presolved LP has 7057 rows, 7401 columns, 295287 non-zeros
A: min|aij| = 1.000e+00 max|aij| = 4.800e+03 ratio = 4.800e+03
GM: min|aij| = 4.342e-01 max|aij| = 2.303e+00 ratio = 5.304e+00
EQ: min|aij| = 1.911e-01 max|aij| = 1.000e+00 ratio = 5.233e+00
Constructing initial basis...
Size of triangular part = 7057
0: obj = 1.000000000e+02 infeas = 9.261e+01 (0)
200: obj = 9.185353661e+01 infeas = 6.939e-02 (0)
* 206: obj = 8.516197148e+01 infeas = 1.254e-14 (0)
* 341: obj = 1.835554600e+01 infeas = 1.321e-14 (0)
OPTIMAL SOLUTION FOUND
Time used: 1.0 secs
Memory used: 501.6 Mb (525989635 bytes)
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Andrew Makhorin <=