Hello, I think i found a bug in numpy.ma I tried it both with the trunk and the 1.1 version import numpy a= numpy.ma.arange(256) a.shape=(128,2) b=numpy.reshape(a,(64,2,2)) Traceback (most recent call last): File "quick_test_reshape.py", line 7, in <module> b=numpy.reshape(a,(64,2,2)) File "/lgm/cdat/latest/lib/python2.5/site-packages/numpy/core/fromnumeric.py", line 116, in reshape return reshape(newshape, order=order) TypeError: reshape() got an unexpected keyword argument 'order'