On 20 April 2013 15:07, Peter S <visserthree@gmail.com> wrote: > octave:1> x=1:5 > x = > > 1 2 3 4 5 > > octave:2> plot(x) > panic: Illegal instruction -- stopping myself... Almost certainly a duplicate of #607244 and #635520 et al. Rebuild your ATLAS for your old hardware. - Jordi G. H.