Grid refinments fail

Grid refinements failed with this error message in GridRefine-*.err

Traceback (most recent call last):
  File "/home/vinaya.valsan/.conda/envs/igwn-py38-clone_rapidpe_rift_devl/bin/rapidpe_compute_intrinsic_grid", line 7, in <module>
    exec(compile(f.read(), __file__, 'exec'))
  File "/home/vinaya.valsan/.conda/envs/igwn-py38-clone_rapidpe_rift_devl/src/rapidpe/bin/rapidpe_compute_intrinsic_grid", line 425, in <module>
    init_region, region_labels = amrlib.load_init_region(opts.refine or opts.prerefine, get_labels=True)
  File "/home/vinaya.valsan/.conda/envs/igwn-py38-clone_rapidpe_rift_devl/src/rapidpe/rapid_pe/amrlib.py", line 410, in load_init_region
    hfile = h5py.File(h5file, "r")
  File "/home/vinaya.valsan/.conda/envs/igwn-py38-clone_rapidpe_rift_devl/lib/python3.8/site-packages/h5py/_hl/files.py", line 507, in __init__
    fid = make_fid(name, mode, userblock_size, fapl, fcpl, swmr=swmr)
  File "/home/vinaya.valsan/.conda/envs/igwn-py38-clone_rapidpe_rift_devl/lib/python3.8/site-packages/h5py/_hl/files.py", line 220, in make_fid
    fid = h5f.open(name, flags, fapl=fapl)
  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/h5f.pyx", line 106, in h5py.h5f.open
OSError: [Errno 37] Unable to open file (unable to lock file, errno = 37, error message = 'No locks available')

I noticed this when initial_region is given.