Why does it keep prompting that mpp open is already open

[jokervTv]

Describe the bug execute

fregrid --input_mosaic grid_spec_mosaic.nc --output_mosaic reg_ll_grid_mosaic.nc --input_dir ../C96 --input_file atmos_daily --output_dir ./ --output_file ll_out.nc --scalar_field omg200 --interp_method conserve_order2 --check_conserve --nthreads 1 --debug

get the error:

****fregrid: second order conservative scheme will be used for regridding.
Memuse(MB) at Before calling get_input_grid, min=8.22656, max=8.22656, avg=8.22656
Memuse(MB) at After calling get_input_grid, min=17.0938, max=17.0938, avg=17.0938
Memuse(MB) at After calling get_output_grid, min=23.3438, max=23.3438, avg=23.3438
Memuse(MB) at After get_input_output_cell_area, min=23.3438, max=23.3438, avg=23.3438
Error from pe 0: mpp_io(mpp_open): ../C96/atmos_daily.tile1.nc is already opened

this is very confusing

System Environment Describe the system environment, include:

• OS: Centos 7.2
• Compiler(s): Intel icc (ICC) 2021.3.0
• netCDF Version: netCDF 4.7.4

Thanks for your reading.

[jokervTv]

sorry, this is due to my carelessness