pd.read_hdf throws 'cannot set WRITABLE flag to True of this array'

When running


I get the following traceback error:

[[...some longer traceback]]

~/.local/lib/python3.6/site-packages/pandas/io/ in read_array(self, key, start, stop) 2487 2488 if isinstance(node, tables.VLArray): -> 2489 ret = node[0][start:stop] 2490 else: 2491 dtype = getattr(attrs, 'value_type', None)

~/.local/lib/python3.6/site-packages/tables/ in getitem(self, key)

~/.local/lib/python3.6/site-packages/tables/ in read(self, start, stop, step)

tables/hdf5extension.pyx in tables.hdf5extension.VLArray._read_array()

ValueError: cannot set WRITEABLE flag to True of this array

No clue what's going on. I've tried reinstalling tables, pandas everything basically, but doesn't want to read it.


  • Are you using numpy 1.16? It is incompatible with the latest release of pytables (see but the pytables team have not yet released a fixed version:

    The only way I found to fix this is to downgrade numpy.