(RESOLVED) "sys-2 : UNRECOVERABLE error on system request" error on Cray Cluster

I am testing with running WPS 3.9.1 on a Cray XC40 cluster. The driving data are the 0.5 degree GFS data. Compilation of WPS 3.9.1 is successful but every time I ran ungrib.exe I got the following error messages and I do not know how to fix the problems. Could you please take a look and let me know if you have any suggestions of how to fix the problems?

Thanks!
Yongxin

......
Name of source model =>NCEP GFS Model GRID 4

sys-2 : UNRECOVERABLE error on system request
No such file or directory

Encountered during an OPEN of unit 13
Fortran unit 13 is not connected
Name of source model =>NCEP GFS Model GRID 4
Name of source model =>NCEP GFS Model GRID 4
Name of source model =>NCEP GFS Model GRID 4

sys-2 : UNRECOVERABLE error on system request
No such file or directory

Encountered during an OPEN of unit 13
Fortran unit 13 is not connected
Name of source model =>NCEP GFS Model GRID 4
srun: error: nid00343: task 15: Aborted
srun: Terminating job step 8671563.0
slurmstepd: error: *** STEP 8671563.0 ON nid00343 CANCELLED AT 2019-03-14T05:18:10 ***
srun: error: nid00343: tasks 0-11,13-14,16-31: Terminated
srun: error: nid00343: task 12: Aborted (core dumped)
srun: Force Terminated job step 8671563.0

Yongxin,

Without access to Cray, it is hard for me to tell exactly what is wrong. The error message shows "no such files or directory", can you figure out which file for directory the code is trying to access? That might be a starting point to figure out what is wrong.

Are you by chance trying to run ungrib.exe in parallel?

Thank you both so much for looking into this problem. I was indeed running ungrib.exe in parallel by setting ntasks=32 and after I changed that to ntasks=1 my ungrib.exe ran through without any problems. Also, when I was running ungrib.exe in parallel, my metgrid.exe was deleted from the run directory every time I ran ungrib.exe but not time time after I set ntasks=1. Thank you so much for fixing this issue!

Yongxin