[Bug-glpk] Problematic model

[Oscar Gustafsson]

Dear Andrew,

the attached MILP model exits with:

*  5400:   objval =   6.264244529e+00   infeas =   0.000000000e+00 (0)
*  5450:   objval =   5.968440326e+00   infeas =   0.000000000e+00 (0)
OPTIMAL SOLUTION FOUND
Integer optimization begins...
+  5450: mip =     not found yet >=              -inf        (1; 0)
+  5481: >>>>>   6.036226238e+00 >=   5.968440326e+00   1.1% (32; 0)
GLPK internal error: x <= ub; file glpios03.c, line 265
Abort

Maybe it is a scaling problem, but just wanted to let you know in case it 
has triggered a bug. I have a very similar model which runs without any 
problems.

With best regards

Oscar Gustafsson

param2.dat
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piecewise1int.mod
Description: Text document