From 3079afa3d8e71af59c346ddb5f99034e27c6a447 Mon Sep 17 00:00:00 2001
From: Paul Romano <paul.k.romano@gmail.com>
Date: Tue, 13 Nov 2018 06:51:03 -0600
Subject: [PATCH] Support older versions of HDF5 data for
 IncidentNeutron.from_hdf5

---
 openmc/data/neutron.py | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/openmc/data/neutron.py b/openmc/data/neutron.py
index 61bea997b8..eec0836029 100644
--- a/openmc/data/neutron.py
+++ b/openmc/data/neutron.py
@@ -502,11 +502,7 @@ class IncidentNeutron(EqualityMixin):
             # Make sure version matches
             if 'version' in h5file.attrs:
                 major, minor = h5file.attrs['version']
-                if major != HDF5_VERSION_MAJOR:
-                    raise IOError(
-                        'HDF5 data format uses version {}.{} whereas your '
-                        'installation of the OpenMC Python API expects version '
-                        '{}.x.'.format(major, minor, HDF5_VERSION_MAJOR))
+                # For now all versions of HDF5 data can be read
             else:
                 raise IOError(
                     'HDF5 data does not indicate a version. Your installation of '