Hi, Following the guidelines of the book Learning SciPy for Numerical and Scientific Computing Second Edition I did the tests: >>> import scipy >>> scipy.test() and got some errors: Ran 23065 tests in 490.568s FAILED (KNOWNFAIL=60, SKIP=1795, errors=29) <nose.result.TextTestResult run=23065 errors=29 failures=0> What should I do? Thank you, Markos