WRF-CHEM, running error

Hi,
The following error occur when running wrf-chem that --> chem_opt=number(0,1,....).
if remove chem_opt in namelist.input, The problem will be solved...
{
module_io_quilt_old.F 2931 T
------ ERROR while reading namelist physics ------
-------------- FATAL CALLED ---------------
FATAL CALLED FROM FILE: LINE: 11345
ERRORS while reading one or more namelists from namelist.input.

application called MPI_Abort(MPI_COMM_WORLD, 1) - process 0
}
Could you help me with this?
What is the solution to this error/problem ?
version:
wrf-chem v3.9

namelist.input

Hi Arman,

chem_opt is a namelist variable that needs to be under &chem, not &physics. If you are not trying to run with chemistry, just remove it. Your other error (re. auxinput5) means that it is looking for an anthropogenic emission input file. I would suggest taking a look at the WRF-Chem user guide for a full discussion on the namelist.

Cheers,

Jordan