wrf.exe error. Segmentation fault (core dumped) Segmentation fault - invalid memory reference.

[zwq]

Hello all,

I am doing a simulation on WRFV4.3 but wrf.exe fails noting "Segmentation fault (core dumped)". I get the following error in "rsl.error.00":

Program received signal SIGSEGV: Segmentation fault - invalid memory reference.

I checked the cfl error using the command 'grep cfl rel*' and indeed the error occurs within d01, but my settings are: dx=27000, time_step=81, i.e. 3 x dx, and I still have the cfl error, how can I modify namelist.input in this case? Another question is about my simulation length of 23 days, does this require a SST update?

I would really appreciate any clue about this error.

Thanks!

Attachment is my namelist.input.

 

[kwerner]

Take a look at What is the most common reason for a segmentation fault?, which provides some other options for addressing CFL issues.

As a side note - it's probably best to keep your time_step as a number that can be evenly divided into the time you're running. For e.g., instead of 81, you could use 90.

 

[zwq]

Thank you for your reply!

I assume that my errors about CFL result from complex terrain in d01 which is a big scope becasue this error only exist in d01 rather than in all domains. As a result, I will first try add 'epssm = 0.2, 0.1, 0.1' in my namelist.input and change my time_step from 81 to 90. I will reply tp you if the modification works.

Here is another question: Do I need to turn on the SST update for this simulation? I'm not sure if this option would benefit the simulation accuracy.

 

[kwerner]

Hi,
Apologies for the delay in response. I got bogged down with some other time-sensitive obligations and then was out of the office for a bit. We do recommend turning on sst_update for any simulations longer than about 5 days.