Error while running forecast wrapper

Hi
I have downloaded the dataset  Hurricane IRMA from the website(https://dtcenter.org/community-code/hurricane-wrf-hwrf/datasets#data-4) to test HWRF installation and my DATA folder contains the following folders
abdecks,fix,gfs.2017090512,loop,recon.2017090512,SYNDAT-PLUS,TEMPDROP

I have configured the launcher_wrapper with "config.run_gsi=no" "config.run_ensemble_da=no" "config.run_relocation=no"  configuration
i was able to succesfully launch and finish the following wrappers
launcher_wrapper
init_gfs_wrapper
init_ocean_wrapper
init_bdy_wrapper
unpost_wrapper

when launching the forecast wrapper i am facing issues 
my system.conf has
[wrfexe]
nio_groups=1          ;; Number of WRF I/O server groups per domain in init jobs
nio_tasks_per_group=0,0,0 ;; Number of I/O servers per group in init jobs
poll_servers=yes      ;; Turn on server polling in init jobs if quilt servers are used (They are not.)
nproc_x=-1            ;; Init job WRF processor count in X direction (-1 = automatic)
nproc_y=-1            ;; Init job WRF processor count in Y direction (-1 = automatic)

[runwrf]
nio_groups=1          ;; Number of WRF I/O server groups per domain
nio_tasks_per_group=4,4,4 ;; Number of I/O servers per group
poll_servers=no      ;; Turn on server polling if quilt servers are used (They are not.)
nproc_x=18           ;; WRF processor count in X direction (-1 = automatic)
nproc_y=36            ;; WRF processor count in Y direction (-1 = automatic)
wrf_compute_ranks=648  ;;

TOTAL_TASKS=673

With the above configurations  i get this 

An error occurred in MPI_Comm_split
reported by process [8813528854213558273,270]
*** on communicator MPI COMMUNICATOR 4 DUP FROM 3
*** MPI_ERR_ARG: invalid argument of some other kind
 *** MPI_ERRORS_ARE_FATAL (processes in this communicator will now abort,
 
The command that is failing is mpiexec')['-np','4','/hwrfrun/sorc/ncep-coupler/cpl_exec/hwrf_wm3c.exe',':','-np','9','/hwrfrun/sorc/pomtc/ocean_exec/hwrf_ocean_fcst.exe',':','-np','648','/hwrfrun/sorc/WRF/run/wrf.exe',':','-np','12','/hwrfrun/sorc/WRF/run/wrf.exe'].out('/hwrfrun/output/pytmp/hwrfrun/2017090512/11L/cpl.out',append=Flase)