Hello I am trying to compile SRILM but not having luck. uname -a: Linux search1.di.uminho.pt 2.6.9-67.0.15.EL #1 Thu May 810:38:13 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux What it happening: Lots of complains like this one: ./testLattice.cc:0: error: CPU you selected does not support x86-64instruction set Thank youAlberto-- Alberto Simões