Well, I've now tried just about every permutation I can think of - including using the ATLAS lapack (instead of generic), in various combinations with ACML, or generic BLAS, or ATLAS blas. No matter what I do, so long as I have lapack of any flavour, I get the 'stats error' with make check. And, it always seems to throw the error at the same point in the stats test file (an svd in cancorr, or some such). Specifically, BLAS/LAPACK routine 'DGESDD' gave error code -12. So, I can pass the 'check tests' so long as I'm willing to drop lapack. Fine, except that big algebra things take insane amounts of time without lapack (1-20 fold decrease in throughput). If it matters, here are some specific specs... gcc version 4.1.2 20080704 (Red Hat 4.1.2-44) lapack-3.0-37.el5 blas-3.0-37.el5 atlas-3.8.3-1.el5 I'd really not have to go through the cycle of trying one distro after another (and I gave up on Fedora because of the all-too-quick end of life on each release, not to mention all the 'broken bits' you need to live with on the 'bleeding edge'). I'm open to suggestions/obvious solutions. I really need to get this working. Thanks in advance...