[Help-glpk] problem with glp_load_matrix

[Hector Arciniegas]

Dear friends.
I am using python with glpk (python-glpk_0.4.45-1_i386) under ubuntu 
12.04 for resolve knapsack problems, this work good from 4 to 500 
variables; but for 1000 variables send me the follow message: "Violación 
de segmento (`core' generado)", after execute "glp_load_matrix(prob, 
2*items, ia, ja, ar)"
Has somebody one idea about?. Thanks.
Hector.