code: def test_error_series_list_no_time_index_series_processor(dummy_data):
      def absx2(sig):
          return [pd.Series(np.abs(sig.values * 2), name="S1")]
  
      # Check if abs_diff returns a series without a name
      absx2_eda = absx2(dummy_data["TMP"])
      assert isinstance(absx2_eda, list)
      assert len(absx2_eda) == 1
      assert isinstance(absx2_eda[0], pd.Series)
      assert absx2_eda[0].name == "S1"
      assert not isinstance(absx2_eda[0].index, pd.DatetimeIndex)
  
      series_processor = SeriesProcessor(
          series_names=["EDA" "TMP"],
          function=absx2,
      )
      series_dict = dataframe_to_series_dict(dummy_data)
  
      with pytest.raises(Exception):
          _ = series_processor(series_dict)
  
imports: from typing import List
  import numpy
  import pandas
  import pytest
  from pandas.testing import assert_index_equal, assert_series_equal
  from tsflex.processing import SeriesProcessor, dataframe_func
  from .utils import dataframe_to_series_dict, dummy_data, series_to_series_dict
label_desc: Use image node_id 25 for calling a global function with example usage: test_error_series_list_no_time_index_series_processor(dummy_data) and returns: list