IOError when opening metadata schema

I am trying to harvest from a CSW endpoint with the following custom configuration:

{"validator_profiles":["gemini2"]}

I am getting the following IOError exception during the fetch stage:

Traceback (most recent call last):
  File "/usr/lib/ckan/default/bin/paster", line 11, in <module>
    sys.exit(run())
  File "/usr/lib/ckan/default/local/lib/python2.7/site-packages/paste/script/command.py", line 102, in run
    invoke(command, command_name, options, args[1:])
  File "/usr/lib/ckan/default/local/lib/python2.7/site-packages/paste/script/command.py", line 141, in invoke
    exit_code = runner.run(args)
  File "/usr/lib/ckan/default/local/lib/python2.7/site-packages/paste/script/command.py", line 236, in run
    result = self.command()
  File "/usr/lib/ckan/default/src/ckanext-harvest/ckanext/harvest/commands/harvester.py", line 191, in command
    fetch_callback(consumer, method, header, body)
  File "/usr/lib/ckan/default/src/ckanext-harvest/ckanext/harvest/queue.py", line 409, in fetch_callback
    fetch_and_import_stages(harvester, obj)
  File "/usr/lib/ckan/default/src/ckanext-harvest/ckanext/harvest/queue.py", line 426, in fetch_and_import_stages
    success_import = harvester.import_stage(obj)
  File "/usr/lib/ckan/default/src/ckanext-spatial/ckanext/spatial/harvesters/base.py", line 496, in import_stage
    is_valid, profile, errors = self._validate_document(harvest_object.content, harvest_object)
  File "/usr/lib/ckan/default/src/ckanext-spatial/ckanext/spatial/harvesters/base.py", line 823, in _validate_document
    valid, profile, errors = validator.is_valid(xml)
  File "/usr/lib/ckan/default/src/ckanext-spatial/ckanext/spatial/validation/validation.py", line 341, in is_valid
    is_valid, error_message_list = validator.is_valid(xml)
  File "/usr/lib/ckan/default/src/ckanext-spatial/ckanext/spatial/validation/validation.py", line 200, in is_valid
    cls.schematrons = cls.get_schematrons()
  File "/usr/lib/ckan/default/src/ckanext-spatial/ckanext/spatial/validation/validation.py", line 282, in get_schematrons
    "validation/xml/gemini2/gemini2-schematron-20110906-v1.2.sch") as schema:
  File "/usr/lib/ckan/default/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 1209, in resource_stream
    self, resource_name
  File "/usr/lib/ckan/default/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 1574, in get_resource_stream
    return open(self._fn(self.module_path, resource_name), 'rb')
IOError: [Errno 2] No such file or directory: 'validation/xml/gemini2/gemini2-schematron-20110906-v1.2.sch'

I have checked and the validation/xml/gemini2/gemini2-schematron-20110906-v1.2.sch file exists and has read permissions for all users.

I'm interested to know if anyone else is experiencing the same issue?

ckan / ckanext-spatial

IOError when opening metadata schema #174