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start_domain: Idealized case cannot have a separate nested input file


New member
Dear all,
I run a ideal case (em_fire) with WRFV3, and the fault happens when I ./wrf.exe. It shows:

-------------- FATAL CALLED ---------------
start_domain: Idealized case cannot have a separate nested input file
Abort(1) on node 0 (rank 0 in comm 0): application called MPI_Abort(MPI_COMM_WORLD, 1) - process 0

I don't know how to deal with this problem.I Can't tell if it's namelist. input and namelist.wps settings are wrong
I would appreciate it if you would take the time out of your busy schedule to check out my problem and give suggestions!
Best regards


  • namelist.wps.png
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  • namelist.input.png
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The ideal em_fire case is designed for a single domain run. The codes must be modified if you want to run a nested case.
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Hi there, I got the same issue but with the em_tropical_cyclones case. Please help to clarify if this case is also designed for only one domain run. I saw many papers in which the idealized TC simulations were run with multiple nests (e.g, Li et al. 2015). If it requires changing the codes, could you please suggest where/how I should start? Thank you!
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If you look at the code module_initialize_tropical_cyclone.F, you will find that the iitialization is only conducted for a single domain. It is not an easy issue to modify the codes for multiple-domain initialization.

I would suggest that you may try a different approach, i.e., in your namelist.input, please specify
input_from_file = .true., .false.,
max_dom = 2

You should also specify other related variables for nesting case (i_parent_start, j_parent_start, parent_grid_ratio, etc)

Please try and let me know whether the ideal case can run in tis way for multiple nesting case. Thanks.
Hi Ming, thank you for your response! I figured out how to make the model run with nesting grids. I tried with the settings you suggested but those did not work. Surprisingly, turning the line input_from_file = .true., .false., to comment does the trick! Warm regards,
Hi Ming, the attached is my testing settings. Warm regards,
Hi, I'm kind of having the same issue. How do you know your nesting is working as intended? eg. how many wrfinput and wrfoutput do you have? Do you have any met_files, or are you basically just using ideal.exe and wrf.exe, with namelist edited as you attached and nothing else?