I had the same problem on cray-xt4 when I used PGI 7.1.6. The problem went away with pgi/7.1.4. (fftw-3.1.1). Rad On Jul 10, 8:41 am, YSun <yud... at nag.co.uk> wrote: > Teo, > > I use pgi 7.1.6. Let me try 6.2.5 to see what will happne. > > Thanks > > Yudong