[Bug-glpk] glpsol: Assertion failed: x >= lb; file glpmip2.c; line 230

[jose]

Hi,

Attached find a MPS file that produces the following output when I try to
solve it by invoking glpsol 4.9. as follows: glpsol --mps model.mps

lpx_read_mps: reading problem data from `model.mps'...
lpx_read_mps: problem name not specified
lpx_read_mps: 65 rows, 54 columns, 240 non-zeros
lpx_read_mps: 54 integer columns, none of which are binary
lpx_read_mps: 239 cards were read
lpx_simplex: original LP has 65 rows, 54 columns, 240 non-zeros
lpx_simplex: presolved LP has 63 rows, 51 columns, 216 non-zeros
lpx_adv_basis: size of triangular part = 63
      0:   objval = -2.520000000e+003   infeas =  1.000000000e+000 (0)
     29:   objval =  8.409999943e+002   infeas =  0.000000000e+000 (0)
*    29:   objval =  8.409999943e+002   infeas =  0.000000000e+000 (0)
*    30:   objval =  7.689999812e+002   infeas =  6.821210263e-013 (0)
OPTIMAL SOLUTION FOUND
Integer optimization begins...
Objective function is integral
+    30: mip =     not found yet >=              -inf        (1; 0)
Assertion failed: x >= lb; file glpmip2.c; line 230

The model works for many different input parameters.
Thanks in advance. Best regards,



Jose M. Framinan

model.mps
Description: MPEG movie