geogrid.exe fails unless using cglc_modis_lcz LANDUSEF — possible cause?

[ZHOU Wan]

Hi all,

I'm encountering an issue when running ./geogrid.exe. The model fails with the following error message:

ERROR: Could not find interpolator sequence for requested resolution for LANDUSEF.
The sources specified in namelist.wps are not listed in GEOGRID.TBL.

This happens when I do not explicitly specify LANDUSEF in geog_data_res, for example:

geog_data_res = 'y2010_urb+y2010_ahe+ISA_CQ+default',
'y2010_urb+y2010_ahe+ISA_CQ+default',
'y2010_urb+y2010_ahe+ISA_CQ+default',

Or even using:

geog_data_res = 'default','default','default',

However, when I include the cglc_modis_lcz LANDUSEF dataset, everything runs fine:

geog_data_res = 'cglc_modis_lcz+y2010_urb+y2010_ahe+albedo_glass2020+modis_fpar2022+modis_lai2022+ISA_LCZ2018+default',
'cglc_modis_lcz+y2010_urb+y2010_ahe+albedo_glass2020+modis_fpar2022+modis_lai2022+ISA_LCZ2018+default',
'cglc_modis_lcz+y2010_urb+y2010_ahe+albedo_glass2020+modis_fpar2022+modis_lai2022+ISA_LCZ2018+default',

So my questions are:

1. Why does geogrid.exe fail when I don’t specify cglc_modis_lcz, even though previously default worked?
2. Does this relate to priority settings in GEOGRID.TBL or missing index files for other LANDUSEF sources?
3. Is there a way to override or force WPS to use a fallback LANDUSEF when others fail?

I believe my static data files are fine — the directories exist, and I used to be able to run with default alone.

Below is my full namelist.wps for reference:

&share
wrf_core = 'ARW',
max_dom = 3
start_date = '2022-08-01_00:00:00', '2022-08-01_00:00:00', '2022-08-01_00:00:00'
end_date = '2022-08-05_23:00:00', '2022-08-05_23:00:00', '2022-08-05_23:00:00'
interval_seconds = 3600,
io_form_geogrid = 2,
/

&geogrid
parent_id = 1, 1, 2
parent_grid_ratio = 1, 3, 3
i_parent_start = 1, 81, 201
j_parent_start = 1, 81, 201
e_we = 307, 439, 79
e_sn = 311, 451, 121

geog_data_res = 'cglc_modis_lcz+y2010_urb+y2010_ahe+albedo_glass2020+modis_fpar2022+modis_lai2022+ISA_LCZ2018+default',
'cglc_modis_lcz+y2010_urb+y2010_ahe+albedo_glass2020+modis_fpar2022+modis_lai2022+ISA_LCZ2018+default',
'cglc_modis_lcz+y2010_urb+y2010_ahe+albedo_glass2020+modis_fpar2022+modis_lai2022+ISA_LCZ2018+default',
! geog_data_res = 'default','default','default'
dx = 9000.0
dy = 9000.0
map_proj = 'lambert'
ref_lon = 106.79891570499628
ref_lat = 29.73164201861055
truelat1 = 30.0
truelat2 = 60.0
stand_lon = 105.0
geog_data_path = '/WPS_GEOG'
/

&ungrib
out_format = 'WPS',
prefix = 'SFILE',
/

&metgrid
fg_name = 'SFILE', 'FILE',
io_form_metgrid = 2,
opt_metgrid_tbl_path = '/WRF-4.6/WPS-4.6.1/metgrid'
/

Thanks in advance for your help!