keyerror when using join

[sephib]

Hi,
Working on the Rasham Hekdesh I've encountered a KeyError: 'שם הקדש' error.
When trying to join the two resources:
hekdeshGeneral.csv and hekdeshPropery.csv

from dataflows import Flow, load, dump_to_path, printer, join
Flow(
   load(hekdeshGeneral, name='hekdesh_general'),
   load(hekdeshProperty, name='hekdesh_property'),
   dump_to_path('hekdesh_general_property'),
    join(
        'hekdesh_general', ['מספר תיק'],  # Source resource
        'hekdesh_property', ['מספר תיק'], # Target resource
        mode='full-outer'   `
    ),
   printer(num_rows=1, tablefmt='html')
).process()[1]

Bellow is the full error stack

--------------------------------------------------------------------------- KeyError Traceback (most recent call last) in 48 mode='full-outer' # Don't add new fields, remove unmatched rows 49 ), ---> 50 printer(num_rows=1, tablefmt='html') 51 ).process()[1]

~/anaconda3/envs/dataflows/lib/python3.7/site-packages/dataflows/base/flow.py in process(self)
13
14 def process(self):
---> 15 return self._chain().process()
16
17 def datastream(self, ds=None):

~/anaconda3/envs/dataflows/lib/python3.7/site-packages/dataflows/base/datastream_processor.py in process(self)
84 try:
85 for res in ds.res_iter:
---> 86 collections.deque(res, maxlen=0)
87 except CastError as e:
88 for err in e.errors:

~/anaconda3/envs/dataflows/lib/python3.7/site-packages/dataflows/helpers/rows_processor.py in process_resource(self, resource)
9
10 def process_resource(self, resource):
---> 11 yield from self.func(resource)

~/anaconda3/envs/dataflows/lib/python3.7/site-packages/dataflows/processors/printer.py in func(rows)
62
63 index = i + 1
---> 64 prow = [index] + [truncate_cell(row[f], max_cell_size) for f in field_names]
65 yield row
66

~/anaconda3/envs/dataflows/lib/python3.7/site-packages/dataflows/processors/printer.py in (.0)
62
63 index = i + 1
---> 64 prow = [index] + [truncate_cell(row[f], max_cell_size) for f in field_names]
65 yield row
66

KeyError: 'שם הקדש'