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forrtl: severe (174): SIGSEGV, segmentation fault occurred

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I am running WRF with nesting. While all the steps upto real.exe have successfully run. wrf.exe is having this error.

forrtl: severe (174): SIGSEGV, segmentation fault occurred
Image PC Routine Line Source
wrf.exe 00000000032A4023 for__signal_handl Unknown Unknown
libpthread-2.17.s 00002AEA983C2630 Unknown Unknown Unknown
wrf.exe 000000000225031C Unknown Unknown Unknown
wrf.exe 00000000022279E2 Unknown Unknown Unknown
wrf.exe 000000000221F50D Unknown Unknown Unknown
wrf.exe 000000000221052A Unknown Unknown Unknown
wrf.exe 0000000001A449FA Unknown Unknown Unknown
wrf.exe 0000000001D937BA Unknown Unknown Unknown
wrf.exe 00000000014A7F76 Unknown Unknown Unknown
wrf.exe 000000000129F9B0 Unknown Unknown Unknown
wrf.exe 0000000000563B6B Unknown Unknown Unknown
wrf.exe 0000000000564182 Unknown Unknown Unknown
wrf.exe 0000000000564182 Unknown Unknown Unknown
wrf.exe 0000000000414141 Unknown Unknown Unknown
wrf.exe 0000000000414101 Unknown Unknown Unknown
wrf.exe 0000000000414092 Unknown Unknown Unknown 00002AEA985F1555 __libc_start_main Unknown Unknown
wrf.exe 0000000000413FA9 Unknown Unknown Unknown

I have attached my namelist.input, domain setup and rslerror files. I am not sure, but I have a feeling that the domain setup might be creating an issue?


  • rslerror.txt
    36 KB · Views: 39
  • domains setup.png
    domains setup.png
    109.9 KB · Views: 1,052
  • namelist.txt
    4.3 KB · Views: 44
Any nested domain N must lie fully within domain N-1 and should not be too close to the boundaries of domain N-1 for nesting to make sense, since domain N takes its boundary conditions from domain N-1.

I don't know a way to run the domains as you intended, you probably need to run d01 three times, I guess.

Best regards,
Hi Lukas,

The weird thing is that this set up works on resolution 45, 15 and 5km nesting, but doesn't work for 25, 5 and 1km nesting. What do you think could be the issue with 1km nesting?
When I look in your rsl file, I see several lines like these:
d07 2013-12-01_00:04:30            5  points exceeded cfl=2 in domain d07 at time 2013-12-01_00:04:30 hours
d07 2013-12-01_00:04:30  MAX AT i,j,k:           54          64           3  vert_cfl,w,d(eta)=   3.334307      -7.713522      9.9363923E-03
d07 2013-12-01_00:04:36            3  points exceeded cfl=2 in domain d07 at time 2013-12-01_00:04:36 hours
d07 2013-12-01_00:04:36  MAX AT i,j,k:           53          65           3  vert_cfl,w,d(eta)=   2.753778      -43.87234      9.9363923E-03
These CFL errors indicate the model has become unstable. Please take a look at this FAQ that addresses CFL errors.