Hi, I'm having trouble renaming record array fields if they contain object arrays in them. I followed the solutions posted by Robert Kern and Stefan van der Walt (Thanks again) but it doesn't look like this method works in all cases. For reference: http://projects.scipy.org/pipermail/numpy-discussion/2008-February/031509.ht... In [1]: from numpy import * In [2]: olddt = dtype([('foo', '|O4'), ('bar', float)]) In [3]: a = zeros(10, olddt) In [4]: a Out[4]: array([(0, 0.0), (0, 0.0), (0, 0.0), (0, 0.0), (0, 0.0), (0, 0.0), (0, 0.0), (0, 0.0), (0, 0.0), (0, 0.0)], dtype=[('foo', '|O4'), ('bar', '<f8')]) In [5]: newdt = dtype([('notfoo', '|O4'), ('notbar', float)]) In [6]: b = a.view(newdt) --------------------------------------------------------------------------- TypeError Traceback (most recent call last) /home/titan/sameer/projects/<ipython console> TypeError: Cannot change data-type for object array. -- Sameer