Can't read loom files with scv.read>=0.1.4

Hello, I previously did some tries on scvelo 0.1.4. Running scvelo 0.1.11.dev6+133abe9 after a git pull. I can’t read loom files anymore. I tried on my files and from downloaded examples:

adata = scv.read('data/ForebrainGlut/hgForebrainGlut.loom', cleanup=True,
sparse=True, cache=True, backup_url='http://pklab.med.harvard.edu/velocyto/hgForebrainGlut/hgForebrainGlut.loom')

adata = scv.read("data/DentateGyrus/10X43_1.loom", sparse=True,
cache=True, backup_url="http://pklab.med.harvard.edu/velocyto/DG1/10X43_1.loom")

WARNING:root:initialising LoomConnection to data/ForebrainGlut/hgForebrainGlut.loom failed, closing file connection
Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
  File "/path/to/local/python/python-dev/lib/python3.6/site-packages/scanpy/readwrite.py", line 78, in read
    backup_url=backup_url, cache=cache, **kwargs)
  File "/path/to/local/python/python-dev/lib/python3.6/site-packages/scanpy/readwrite.py", line 445, in _read
    adata = read_loom(filename=filename, **kwargs)
  File "/path/to/local/python/python-dev/lib/python3.6/site-packages/anndata/readwrite/read.py", line 152, in read_loom
    with connect(filename, 'r') as lc:
  File "/path/to/local/python/python-dev/lib/python3.6/site-packages/loompy/loompy.py", line 957, in connect
    return LoomConnection(filename, mode)
  File "/path/to/local/python/python-dev/lib/python3.6/site-packages/loompy/loompy.py", line 83, in __init__
    raise e
  File "/path/to/local/python/python-dev/lib/python3.6/site-packages/loompy/loompy.py", line 72, in __init__
    self.row_graphs = loompy.GraphManager(self, axis=0)
  File "/path/to/local/python/python-dev/lib/python3.6/site-packages/loompy/graph_manager.py", line 34, in __init__
    ds._file.create_group(a)
  File "/path/to/local/python/python-dev/lib/python3.6/site-packages/h5py/_hl/group.py", line 60, in create_group
    gid = h5g.create(self.id, name, lcpl=lcpl, gcpl=gcpl)
  File "h5py/_objects.pyx", line 54, in h5py._objects.with_phil.wrapper
  File "h5py/_objects.pyx", line 55, in h5py._objects.with_phil.wrapper
  File "h5py/h5g.pyx", line 161, in h5py.h5g.create
ValueError: Unable to create group (no write intent on file)

I tried to checkout to 0.1.10 and 0.1.6, same issue. Are they new (missing) library requirements since v0.1.4?

Thanks.

[Mkebede]

Thank you for the suggestion. For me the issue was that the LoomValidator was outdated and incompatible with the latest version. Uninstalling and reinstalling the loom package seemed to address the issue.

For anyone else having that issue, I did:

pip uninstall loom
pip install loom

Thank you again for your help!

[VolkerBergen]

Try with scv.read('filename' , validate=False).