Hi, It took a whole weekend to get Scipy working with the Intel compiler. Now all scipy tests pass (except test_shapiro) also with ifc. However, few functions from special.cephes still cause python to crash (see test methods starting with _check). I'll get back to it later when special module has more tests that actually test the correctness cephes functions results. Currently when cephes functions (built with gcc) return results then I am not always sure that they are correct, in same cases I have even been unable to call these functions without getting domain errors (see test methods starting with __check). Anyway, guide lines how to build scipy with ifc can be found in INSTALL.txt. Unfortunately, the building process is not as straightforward as one would wish: 1) there is binary incompability between ifc and g77 generated codes so that ATLAS and LAPACK libraries *must* be compiled with ifc. 2) in some cases ifc optimization is too good so that LAPACK functions ?lamch fail for that; see INSTALL.txt for a workaround. Finally, Intel Fortran Compiler 5.0 is not supported because scipy build fails with internal compiler error when debugging flags are enabled. Regards, Pearu