Hello, Just thought I'd report this test failure with current svn (rev 4464) on Mac OS X 10.5 (could be a leopard issue?) since I hadn't seen it mentioned before. Oddly it only seems to fail in ipython, importing and running from the normal python interpreter all the tests pass. Actually, it only seems to fail when I start ipython with ipython -p scipy I haven't been able to recreate the problem with any other combination of startup and imports. Here is my ipythonrc-scipy: # load our basic configuration with generic options include ipythonrc # import ... # Load Numpy an SciPy by themselves so that 'help' works on them import_mod numpy scipy # from ... import ... import_some # Now we load all of SciPy # from ... import * import_all numpy import_all scipy ------------------------------------------- Here is the error: ====================================================================== ERROR: Ticket #396 ---------------------------------------------------------------------- Traceback (most recent call last): File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/numpy/core/tests/test_regression.py", line 600, in check_poly1d_nan_roots self.failUnlessRaises(N.linalg.LinAlgError,getattr,p,"r") File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/unittest.py", line 320, in failUnlessRaises callableObj(*args, **kwargs) File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/numpy/lib/polynomial.py", line 623, in __getattr__ return roots(self.coeffs) File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/numpy/lib/polynomial.py", line 124, in roots roots = _eigvals(A) File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/numpy/lib/polynomial.py", line 40, in _eigvals return eigvals(arg) File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/scipy/linalg/decomp.py", line 378, in eigvals return eig(a,b=b,left=0,right=0,overwrite_a=overwrite_a) File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/scipy/linalg/decomp.py", line 128, in eig a1 = asarray_chkfinite(a) File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/numpy/lib/function_base.py", line 398, in asarray_chkfinite raise ValueError, "array must not contain infs or NaNs" ValueError: array must not contain infs or NaNs ---------------------------------------------------------------------- Ran 692 tests in 0.456s FAILED (errors=1) Out[2]: <unittest._TextTestResult run=692 errors=1 failures=0> Thanks, Robin