Segmentation fault while running wrf.exe at 1km resolution

[vv20iitbbs]

Hi,

I am using the WRF v4.0 model for simulations over the mountainous region of India. Model IC/BC is being used from ERA5 datasets. Simulation has three domains, i.e., D1 = 20 km, D2 = 4 km, and D3 = 1 km resolution. WPS and WRF-real completed without any error messages while running wrf.exe I am getting segmentation fault.

Below, I am attaching model namelist.input and rsl.error files. I seek assistance and advice as to how to resolve this error.

I appreciate your assistance and advice.

Thank you

Regards,
Vijay

 

[kwerner]

Hi Vijay,
I searched your rsl file to see if you had any CFL errors and found a couple of them:

d02 2023-10-03_00:00:00            4  points exceeded cfl=2 in domain d02 at time 2023-10-03_00:00:00 hours
d02 2023-10-03_00:00:00  MAX AT i,j,k:           51          70          15  vert_cfl,w,d(eta)=   15.3985281      0.258993536       5.00000082E-02
d02 2023-10-03_00:00:00           17  points exceeded cfl=2 in domain d02 at time 2023-10-03_00:00:00 hours
d02 2023-10-03_00:00:00  MAX AT i,j,k:           46          72          16  vert_cfl,w,d(eta)=   28.6058693       33.0032768       5.00000082E-02

Take a look at What is the most common reason for a segmentation fault? for information on addressing CFL errors. If it still fails, check to see if you still have CFL errors by using this command:

grep cfl rsl*

As a side note, I see you are using 4 processors. That may be enough, but if you address the CFL errors and you still get a seg-fault, you may want to try to increase that number, if possible. You could try 36 and see if it helps - and it should run faster with 36.