I just finished an install of numpy/scipy/matplotlib on a 64-bit RHEL5 system, and am now trying to replicate that on a 32-bit system. So far, there are two differences: 1) fftw3 is not available through yum on the 32-bit system, so I built it from source. 2) Attempting to build scipy results in the error below. Attached is a PDF with the notes (most of which came from Phil Austin) I compiled after installing on the 64-bit system. I'm currently recompiling ATLAS (which takes an amazingly long time), and then will try to rebuild LAPACK, BLAS, etc. Before I get there, does anyone have any idea what the root of the below error might be? usr/local/bin/python setup.py build Traceback (most recent call last): File "setup.py", line 53, in <module> setup_package() File "setup.py", line 28, in setup_package from numpy.distutils.core import setup File "/usr/local/lib/python2.5/site-packages/numpy/__init__.py", line 103, in <module> import linalg File "/usr/local/lib/python2.5/site-packages/numpy/linalg/__init__.py", line 4, in <module> from linalg import * File "/usr/local/lib/python2.5/site-packages/numpy/linalg/linalg.py", line 29, in <module> from numpy.linalg import lapack_lite ImportError: /usr/local/lib/python2.5/site-packages/numpy/linalg/lapack_lite.so: undefined symbol: cblas_zgemm Thanks, Mike -- ------------------------------------------------------ Michael Hearne mhearne@usgs.gov (303) 273-8620 USGS National Earthquake Information Center 1711 Illinois St. Golden CO 80401 Senior Software Engineer Synergetics, Inc. ------------------------------------------------------