WRF Segmentation fault when reached radiation time step

[FedeJack]

WRF-4.5
I'm simulating three domains as set in the namelist.input1, for a 700 mm rainfall event in one day, rainfall starting at 9 am. Initial data is from ERA5. The simulation only runs successfully if I simulate the first two domains, so I used ndown to simulate domain d03 separately.
I ran wrf with max_dom = 2 and namelist.input1, then ndown.exe with namelist.input2.
After renaming the output files, I ran wrf.exe with only the d03 domain with the parameters in namelist.input2 moved to column 1. The simulation crashes with a segmentation fault when I reach the radiation calculation time step, even if I set it to 1, 3, or 9.
I've now tried with the default namelist.input, attached here as namelist.input3, but I get the same behavior (rsl.zip).
Thanks in advance.

 

[FedeJack]

Update: I try add in namelist3.input epssm = 0.2 and time_step = 1. This remove the CFL errors from all rsl.error* file but the segmentation fault when reached the radiation time step remains.

 

[kwerner]

Hi,
Apologies for the long delay in response while our team tended to time-sensitive obligations. Thank you for your patience.

Because the size of your domains are nearly identical between domains, using the ndown option to run domain 3 will not be beneficial. This is only helpful when the sizes vary so much that it becomes difficult to use the number of processors necessary to run the larger domain because that number is too large for the number allowed to run the smaller domain. So let's reduce part of the complication of this issue by going back to running all 3 domains simultaneously.

Can you try to run that again, decreasing the time_step and adding epssm to the namelist? You may also need to set smooth_cg_topo=.true. to the &domains section prior to running real.exe. Also, the setting for radt should be the same for each domain. So if you set it to 9 for d01, it should be set to 9 for d02 and d03, as well. If you try that and it fails again, please attach the updated namelist, along with the rsl* files again. Thanks!