Hi, Oops, I forgot to remove the build directory in numpy. Sorry for the noise ! Finally I was able to install numpy and scipy ! Now scipy.test() freezes with Resizing... 20 7 35 Resizing... 23 7 47 Resizing... 24 25 58 Resizing... 28 7 68 Resizing... 28 27 73 .....Use minimum degree ordering on A'+A. .................Resizing... 16 17 24 Resizing... 20 7 35 Resizing... 23 7 47 Resizing... 24 25 58 Resizing... 28 7 68 Resizing... 28 27 73 .....Use minimum degree ordering on A'+A. ....................................../usr/local/lib64/python2.5/site-packages/scipy/interpolate/fitpack2.py:457: UserWarning: The coefficients of the spline returned have been computed as the minimal norm least-squares solution of a (numerically) rank deficient system (deficiency=7). If deficiency is large, the results may be inaccurate. Deficiency may strongly depend on the value of eps. warnings.warn(message) ...........*** glibc detected *** /usr/bin/python: double free or corruption (!prev): 0x0000000002263320 *** Can someone reproduce this ? Should I file a bug report ? Nils