Registration problems:
  symbol ‘`_reticulate_is_python3`’ not in namespace:
   .Call(`_reticulate_is_python3`)
  symbol ‘`_reticulate_py_activate_virtualenv`’ not in namespace:
   .Call(`_reticulate_py_activate_virtualenv`, script)
  symbol ‘`_reticulate_py_call_impl`’ not in namespace:
   .Call(`_reticulate_py_call_impl`, x, args, keywords)
  symbol ‘`_reticulate_py_clear_last_error`’ not in namespace:
   .Call(`_reticulate_py_clear_last_error`)
  symbol ‘`_reticulate_py_compare_impl`’ not in namespace:
   .Call(`_reticulate_py_compare_impl`, a, b, op)
  symbol ‘`_reticulate_py_dict`’ not in namespace:
   .Call(`_reticulate_py_dict`, keys, items, convert)
  symbol ‘`_reticulate_py_dict_get_item`’ not in namespace:
   .Call(`_reticulate_py_dict_get_item`, dict, key)
  symbol ‘`_reticulate_py_dict_get_keys_as_str`’ not in namespace:
   .Call(`_reticulate_py_dict_get_keys_as_str`, dict)
  symbol ‘`_reticulate_py_dict_length`’ not in namespace:
   .Call(`_reticulate_py_dict_length`, dict)
  symbol ‘`_reticulate_py_dict_set_item`’ not in namespace:
   .Call(`_reticulate_py_dict_set_item`, dict, item, value)
  symbol ‘`_reticulate_py_eval_impl`’ not in namespace:
   .Call(`_reticulate_py_eval_impl`, code, convert)
  symbol ‘`_reticulate_py_finalize`’ not in namespace:
   .Call(`_reticulate_py_finalize`)
  symbol ‘`_reticulate_py_get_attr_impl`’ not in namespace:
   .Call(`_reticulate_py_get_attr_impl`, x, name, silent)
  symbol ‘`_reticulate_py_get_attribute_types`’ not in namespace:
   .Call(`_reticulate_py_get_attribute_types`, x, attributes)
  symbol ‘`_reticulate_py_has_attr_impl`’ not in namespace:
   .Call(`_reticulate_py_has_attr_impl`, x, name)
  symbol ‘`_reticulate_py_initialize`’ not in namespace:
   .Call(`_reticulate_py_initialize`, python, libpython, pythonhome, 
       virtualenv_activate, python3, interactive, numpy_load_error)
  symbol ‘`_reticulate_py_is_callable`’ not in namespace:
   .Call(`_reticulate_py_is_callable`, x)
  symbol ‘`_reticulate_py_is_function`’ not in namespace:
   .Call(`_reticulate_py_is_function`, x)
  symbol ‘`_reticulate_py_is_none`’ not in namespace:
   .Call(`_reticulate_py_is_none`, x)
  symbol ‘`_reticulate_py_is_null_xptr`’ not in namespace:
   .Call(`_reticulate_py_is_null_xptr`, x)
  symbol ‘`_reticulate_py_iter_next`’ not in namespace:
   .Call(`_reticulate_py_iter_next`, iterator, completed)
  symbol ‘`_reticulate_py_iterate`’ not in namespace:
   .Call(`_reticulate_py_iterate`, x, f)
  symbol ‘`_reticulate_py_last_error`’ not in namespace:
   .Call(`_reticulate_py_last_error`)
  symbol ‘`_reticulate_py_list_attributes_impl`’ not in namespace:
   .Call(`_reticulate_py_list_attributes_impl`, x)
  symbol ‘`_reticulate_py_list_submodules`’ not in namespace:
   .Call(`_reticulate_py_list_submodules`, module)
  symbol ‘`_reticulate_py_module_import`’ not in namespace:
   .Call(`_reticulate_py_module_import`, module, convert)
  symbol ‘`_reticulate_py_module_proxy_import`’ not in namespace:
   .Call(`_reticulate_py_module_proxy_import`, proxy)
  symbol ‘`_reticulate_py_numpy_available_impl`’ not in namespace:
   .Call(`_reticulate_py_numpy_available_impl`)
  symbol ‘`_reticulate_py_print`’ not in namespace:
   .Call(`_reticulate_py_print`, x)
  symbol ‘`_reticulate_py_ref_to_r`’ not in namespace:
   .Call(`_reticulate_py_ref_to_r`, x)
  symbol ‘`_reticulate_py_ref_to_r_with_convert`’ not in namespace:
   .Call(`_reticulate_py_ref_to_r_with_convert`, x, convert)
  symbol ‘`_reticulate_py_run_file_impl`’ not in namespace:
   .Call(`_reticulate_py_run_file_impl`, file, local, convert)
  symbol ‘`_reticulate_py_run_string_impl`’ not in namespace:
   .Call(`_reticulate_py_run_string_impl`, code, local, convert)
  symbol ‘`_reticulate_py_set_attr_impl`’ not in namespace:
   .Call(`_reticulate_py_set_attr_impl`, x, name, value)
  symbol ‘`_reticulate_py_str_impl`’ not in namespace:
   .Call(`_reticulate_py_str_impl`, x)
  symbol ‘`_reticulate_py_tuple`’ not in namespace:
   .Call(`_reticulate_py_tuple`, items, convert)
  symbol ‘`_reticulate_py_tuple_length`’ not in namespace:
   .Call(`_reticulate_py_tuple_length`, tuple)
  symbol ‘`_reticulate_py_validate_xptr`’ not in namespace:
   .Call(`_reticulate_py_validate_xptr`, x)
  symbol ‘`_reticulate_r_to_py_impl`’ not in namespace:
   .Call(`_reticulate_r_to_py_impl`, object, convert)
See chapter ‘System and foreign language interfaces’ in the ‘Writing R
Extensions’ manual.