Scheduled Downtime
On Friday 21 April 2023 @ 5pm MT, this website will be down for maintenance and expected to return online the morning of 24 April 2023 at the latest

Segmentation fault: CFL error

samudra

New member
I have been trying to run wrf.exe using mpi on 2 nodes with 24 ppn. I have attached namelist.input and rsl.error files here.
The issue is coming from the CFL error condition, where CFL values exceed 2 at certain grid points. I tried implementing the solutions posted in a few threads, like reducing time_step to 4XDX or 3XDX, or introducing certain variables to smooth topography. I have also tried all solution based on this thread - Segmentation Faults and CFL Errors . I have also tried using the adaptive time step, but it did not work. Kindly let me know what could be done differently.
 

Attachments

  • namelist.input
    4.5 KB · Views: 2
  • rsl.error.0046.txt
    15.3 KB · Views: 1
Last edited:
Your namelist.input looks fine. However, CFL violation occurred almost right after the model started, indicating that the input data may be not correct.

What is the data you used to drive this case? Did you run tc.exe before moving on to run wrf.exe?
 
Hi,
I used ERA5 reanalysis data downloaded from RDA website. I have run some cases earlier for one nested domain using the same dataset and configuration for 8-10 days, but for different dates and times, and it ran successfully. Regarding the tc.exe, actually I am not running it for cyclone cases specific but wanted to give a run for a long time, lets say for a month, but it has been there in the namelist file from earlier runs. Is that causing a problem for this?
 
Top