[Help-glpk] Skip preprocessing

[Daniel Andrén]

Hi,

I am trying to get glpsol to start to try to solve this problem (from
"Logic and Integer Programming" by H.P.Williams):

var x1, >= 1, integer;
var x2, integer;

maximize obj: x2;

s.t. c1:
     3*x1 - 3*x2 >= 1;
s.t. c2:
     4*x1 - 4*x2 <= 3;

but it is stuck in preprocessing. Can I skip preprocessing in some
way? I have tried the --nopresol and --noscale flags to no avail. It
works fine with the --nomip flag, so it has probably something to do
with MIP preprocessing.

/Daniel Andrén
Dep. of mathematics and mathematical statistics
Umeå University
Sweden