Hi all, I've got a problem I'm trying to solve regarding HDF5, and I've found it's specifically related to yt. This sequence works: f = h5py.open(filename, "r") do stuff with f f.close() f = h5py.open(filename, "r+") However, this sequence does not: pf = load(filename) do stuff with the pf pf._handle.close() del pf f = h5py.open(filename, "r+") It results in this: --------------------------------------------------------------------------- NameError Traceback (most recent call last) <ipython-input-8-186261e4952a> in <module>() ----> 1 f = h5py.File("desktop_stuff/GasSloshing/GasSloshing/sloshing_nomag2_hdf5_plt_cnt_0150", "r+") NameError: name 'h5py' is not defined In [9]: import h5py In [10]: f = h5py.File("desktop_stuff/GasSloshing/GasSloshing/sloshing_nomag2_hdf5_plt_cnt_0150", "r+") --------------------------------------------------------------------------- IOError Traceback (most recent call last) <ipython-input-10-186261e4952a> in <module>() ----> 1 f = h5py.File("desktop_stuff/GasSloshing/GasSloshing/sloshing_nomag2_hdf5_plt_cnt_0150", "r+") /Users/jzuhone/yt-x86_64/lib/python2.7/site-packages/h5py/_hl/files.pyc in __init__(self, name, mode, driver, libver, **kwds) 148 pass 149 fapl = make_fapl(driver,libver,**kwds) --> 150 fid = make_fid(name, mode, fapl) 151 Group.__init__(self, fid) 152 self._shared.lcpl = make_lcpl() /Users/jzuhone/yt-x86_64/lib/python2.7/site-packages/h5py/_hl/files.pyc in make_fid(name, mode, plist) 45 fid = h5f.open(name, h5f.ACC_RDONLY, fapl=plist) 46 elif mode == 'r+': ---> 47 fid = h5f.open(name, h5f.ACC_RDWR, fapl=plist) 48 elif mode == 'w-': 49 fid = h5f.create(name, h5f.ACC_EXCL, fapl=plist) /Users/jzuhone/yt-x86_64/lib/python2.7/site-packages/h5py/h5f.so in h5py.h5f.open (h5py/h5f.c:1618)() IOError: unable to open file (File accessability: Unable to open file) Anyone have any ideas? Best, John Z