land cover data error ?

[LUP_ Sree]

I'm not quite sure if this is a landcover data error,  as i'm trying yo get familiar to use the tools, i draw the simplest lancover data and fed the attribute table in accordance with the source data folder files. but i keep getting this following error for my SPREADGIS analysis 

Failed script spreadgis...

Traceback (most recent call last):
  File "C:\smt\toolbox_V4_4_2\toolbox\scripts\C_spreadgis.py", line 170, in <module>
    landcover_type = "nlcd", use_old_barrier = 0)
  File "C:\smt\toolbox_V4_4_2\toolbox\scripts\soundprophlpr.py", line 224, in SoundPropagation
    point_fill, freq_fill, my_times, my_time_labels, point_counter, keep_intermediates, use_old_barrier)
  File "C:\smt\toolbox_V4_4_2\toolbox\scripts\spreadgishlpr.py", line 71, in spreadgis
    BPD, max_veg_loss = calculate_barrier_path_distance_and_vegmax(Sound_Source, dem_ft, landcover, eucdist_ft, source_offset, receiver_offset, idir)
  File "C:\smt\toolbox_V4_4_2\toolbox\scripts\spreadgishlpr.py", line 973, in calculate_barrier_path_distance_and_vegmax
    max_dist, dist_vec, terrain_cut, veg_cut = get_terrain_cut(xyzsrc_cell, xyzrec_cell, cell_size, cell_size, numpy_dem, numpy_lc, lc_attribute_table)
  File "C:\smt\toolbox_V4_4_2\toolbox\scripts\spreadgishlpr.py", line 1390, in get_terrain_cut
    lc_vec = reclass_to_spreadtype(lc_vec, lc_attribute_table)
  File "C:\smt\toolbox_V4_4_2\toolbox\scripts\spreadgishlpr.py", line 1576, in reclass_to_spreadtype
    new_lc = lc_attribute_table[lc]
KeyError: 0

Failed to execute (spreadgis).
Failed at Mon Feb 06 18:21:27 2023 (Elapsed Time: 8.50 seconds)

any help much appreciated 

thank you.

[LUP_ Sree]

figured it out, it was an issue with the landuse and the model extent. SMT really works. thank you all for making it.