test_fit_to_mesh_errorsIII

[ole]

I noticed that this test failed on some windows machines. Then I changed the sys.exit() actions to raise IOError. This seams to be cleaner \ and provides more info than sys.exit() However. the test nom fails on the Linux platforms probably due to the underlying function not detecting the 'bad fliename' properly.

[duncan]

Fixed. The bad filename was not bad enough.