Nathan, Please can you add the missing file "torus.mtx.gz". Thanks in advance. Cheers, Nils python -i /usr/local/lib64/python2.5/site-packages/scipy/sandbox/multigrid/tests/test_coarsen.py Found 8/8 tests for __main__ ...E.... ====================================================================== ERROR: check_sample_data (__main__.test_sa_constant_interpolation) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/local/lib64/python2.5/site-packages/scipy/sandbox/multigrid/tests/test_coarsen.py", line 153, in check_sample_data A = read_matrix(filename) File "/usr/local/lib64/python2.5/site-packages/scipy/sandbox/multigrid/tests/examples.py", line 8, in read_matrix fid = gzip.open(filename) File "/usr/lib64/python2.5/gzip.py", line 49, in open return GzipFile(filename, mode, compresslevel) File "/usr/lib64/python2.5/gzip.py", line 95, in __init__ fileobj = self.myfileobj = __builtin__.open(filename, mode or 'rb') IOError: [Errno 2] No such file or directory: 'sample_data/torus.mtx.gz' ---------------------------------------------------------------------- Ran 8 tests in 8.699s FAILED (errors=1)