Hi I ran the code according to MCTK manual for MOD11A1 file, but it displays the error as "attempt to subscript NUM_DIMS_ARRAY with VALID_SDS is out of range ". The Code is: pro test_batch_modis_conversion_grid compile_opt idl2 modis_grid_file = 'C:\MOD11A1.A2008336.h25v06.005.2008337232328.hdf' output_location = 'C:\output\' output_rootname = 'lst_day' grid_name = 'MODIS_Grid_Daily_1km_LST' sd_names = ['LST_day_1km'] out_method = 1 output_projection = envi_proj_create(/geographic) out_ps_x=0.01d out_ps_y=0.01d interpolation_method = 6 convert_modis_data, in_file=modis_grid_file, $ out_path = output_location, out_root= output_rootname, $ /higher_product, /grid, gd_name=grid_name, sd_names=sd_names, $ out_method= out_method, out_proj=output_projection, $ out_ps_x=out_ps_x, out_ps_y=out_ps_y, num_x_pts=50, num_y_pts=50, $ interp_method=interpolation_method, $ r_fid_array=r_fid_array, r_fname_array=r_fname_array END