real.exe gives invalid parent domain 2 error

[Brett Raczka]

When executing real.exe to generate my wrfinput files I am getting an 'invalid parent domain 2' error for my 2 domain WRF nested setup. Looking at other threads on this forum I assume this is due to a conflict with how I set up my namelist.wps and namelist.input (attached), but I cannot identify it. Also including my rsl.out.0000 output file. Any guidance on how to correct this would be much appreciated. My working directory is on Derecho: /glade/derecho/scratch/bmraczka/WRFv4.5_nested/icbc/ where you can find all these files and more. Thank You.

 

[Ming Chen]

Please change your options as follows:

grid_id = 1, 2

parent_id = 0, 1

Then try again. Let me know if it still doesn't work.

 

[Brett Raczka]

Hi Ming --

Thank you for your help. Even when I change to those options I receive the identical invalid parent domain 2 error.

 

[Ming Chen]

Hi Brett,

I copied your namelist.input and met_em files, and repeated your case. I got the same error as you did, although both namelist.input and met_em files look fine. I am really puzzled by this case ....

I noticed that the grid structure in the namelist.wps you posted Monday is different to that in your working directory /glade/derecho/scratch/bmraczka/WRFv4.5_nested/icbc/

I am not sure whether you mistakenly mix something.

Can you run WPS using the namelist.wps you posted, then move on to run REAL? Let's see whether you still have the same issue...

 

[Brett Raczka]

Hi Ming,

I have been trying multiple nested grid structures with varying grid number and ratios to see if that fixed the issue -- that is why my namelist files on Derecho looked a bit different from what I had posted. Still, it doesn't matter what grid structure I use, I still get the same error. I reran WPS using the original 1:3 grid ratio I had posted here and got the same error. See the updated files here: /glade/derecho/scratch/bmraczka/WRFv4.5_nested/icbc/. I successfully recreate the geo_em and met_em files each time, but it always gets hung up during the real.exe step to generate the wrfinput regardless of the grid ratio.....

 

[Ming Chen]

Hi Brett,

I can repeat your errors using your namelist files. Due to limited resources I have, I cannot afford to debug each items involved in this error.

As an alternative, I just did a test case of nesting run. Please see the attached namelist.wps and namelist.input files. They work fine to create and run nesting case. Can you use my files as examples, and modify these files for your specific case?

Please let me know if you still have the 'parent id' issue, --- I won't expect this error would occur. Let me know how they work for you.

 

[Brett Raczka]

Hi Ming --

Using your nested namelist settings as a guide I was able to identify that 'num_metgrid_soil_levels' within namelist.wps was causing the invalid parent id problem. Although I had the value set correctly (= 4) based on the met_em* input file -- I had it set for both domains (2 columns) when it is a single entry variable (domain 1 only). This was tough to troubleshoot given the error description - thanks for the help.

By the way -- what processor setup do you use for your nesting case example to run real.exe ? Is this forum issue still the best guidance on this?

Brett

 

[Ming Chen]

Brett,

Thank you for the follow-up. I am glad it works for you.

Yes please follow the forum issue to run your cases.

Ming