Re: [Help-glpk] Problem in GLPK

[Andrew Makhorin]

> A certain constraint that I put in my model gets the following error,
> after "preprocessing":

>   glp_malloc: no memory available
>   Error detected in file    \src\glpenv05.c at line 70

> The constraint that caused that error is:

> s.t. Delivery_from_Same_Project{j in J, k in K, p in P, t in T: j!=k}:
> xx[j,k,p,t] ==0;

> I also tried it using <> instead of !=, but still the same problem.

> Does anyone how to solve that? Is it a bug or what?

It is not a bug. This happened because glpsol used all the available
ram on your machine. Disabling the presolver with '--nopresol' may help.

Please see
http://lists.gnu.org/archive/html/help-glpk/2008-07/msg00044.html
for some calculations concerning the memory requirements.