Comment 1 for bug 695241

Looks like same issue when updating an existing database.

Just refreshed modules from trunk and this is the result of updating a database with NO HR module installed:

Updating Database with current modules
Traceback (most recent call last):
  File "./openerp-server.py", line 121, in <module>
    db,pool = pooler.get_db_and_pool(dbname, update_module=tools.config['init'] or tools.config['update'], pooljobs=False)
  File "/home/openerp/openerp/server/bin/pooler.py", line 39, in get_db_and_pool
    addons.load_modules(db, force_demo, status, update_module)
  File "/home/openerp/openerp/server/bin/addons/__init__.py", line 869, in load_modules
    r = load_module_graph(cr, graph, status, report=report)
  File "/home/openerp/openerp/server/bin/addons/__init__.py", line 742, in load_module_graph
    load_init_update_xml(cr, m, idref, mode, kind)
  File "/home/openerp/openerp/server/bin/addons/__init__.py", line 633, in load_init_update_xml
    tools.convert_csv_import(cr, m, os.path.basename(filename), fp.read(), idref, mode=mode, noupdate=noupdate)
  File "/home/openerp/openerp/server/bin/tools/convert.py", line 945, in convert_csv_import
    result, rows, warning_msg, dummy = pool.get(model).import_data(cr, uid, fields, datas,mode, module, noupdate, filename=fname_partial)
  File "/home/openerp/openerp/server/bin/osv/orm.py", line 859, in import_data
    process_liness(self, datas, [], current_module, self._name, fields_def, position=position)
  File "/home/openerp/openerp/server/bin/osv/orm.py", line 809, in process_liness
    res = _get_id(relation, line[i], current_module, mode)
  File "/home/openerp/openerp/server/bin/osv/orm.py", line 723, in _get_id
    record_id = ir_model_data_obj._get_id(cr, uid, module, xml_id)
  File "/home/openerp/openerp/server/bin/tools/misc.py", line 808, in cached_result
    result2 = fn(self2, cr, *args[:self.skiparg-2], **kwargs2)
  File "/home/openerp/openerp/server/bin/addons/base/ir/ir_model.py", line 416, in _get_id
    raise ValueError('No references to %s.%s' % (module, xml_id))
ValueError: No references to base.group_hr_user

V6 trunk at:
Server 3163
Addons 4080