Error running OM4_025

[yz3062]

Hi all, My name is Yuxin and I'm new to MOM6. I'm trying to run the example in MOM6-examples/ice_ocean_SIS2/OM4_025. While running the program, I encountered the following error:

---------
NOTE: MOM_domains_init: reading maskmap information from INPUT/mask_table.96.32x18
parse_mask_table: Number of domain regions masked in ice model = 96

FATAL: fms_io(parse_mask_table_2d): mpp_npes() .NE. layout(1)*layout(2) - nmask for ice model
----------

My question is related to this post, as this is the same error reported there. However, I couldn't figure out from that post whether the error was resolved or how. Any suggestions would be much appreciated!

 

[yz3062]

Update: after increasing the number of processes to 480, the issue is resolved. Is 480 processes a prerequisite for running this example?

 

[yz3062]

It looks like LAYOUT is specified in OM4_025/MOM_input, so it is changeable. Sorry for posting a question prematurely...

 

[marshallward]

Looks like you figured it out, but just in case...

Your MPI request needs to account for masked domains, which is in the first line of the mask_table file. So if LAYOUT = 32, 18 and the mask is 96, then you need to request 32*18 - 96 = 480 cpus.

 

[yz3062]

Looks like you figured it out, but just in case...

Your MPI request needs to account for masked domains, which is in the first line of the mask_table file. So if LAYOUT = 32, 18 and the mask is 96, then you need to request 32*18 - 96 = 480 cpus.

Thank you! I appreciate the explanation!

 

[Fengyun Luo]

Hi Yuxin, I'm also new to MOM6, and I wanted to check with you—have you managed to get the "ocean_daily.nc" like output files when running the OM4_025 case? I've run the case myself, and even though the diag_table is set up to output these files, I haven't received anything. I'm not sure what step I might be missing here.

 

[yz3062]

Hi Yuxin, I'm also new to MOM6, and I wanted to check with you—have you managed to get the "ocean_daily.nc" like output files when running the OM4_025 case? I've run the case myself, and even though the diag_table is set up to output these files, I haven't received anything. I'm not sure what step I might be missing here.

The only thing I can think of is to make sure your diag_table is populated. There are multiple diag_tables in the folder with extensions like "diag_table_MOM6". Those aren't read by the model. Only the file exactly named "diag_table" is used, and the default diag_table is empty.

 

[Fengyun Luo]

The only thing I can think of is to make sure your diag_table is populated. There are multiple diag_tables in the folder with extensions like "diag_table_MOM6". Those aren't read by the model. Only the file exactly named "diag_table" is used, and the default diag_table is empty.

right, I have renamed the diag_table.MOM6 to diag_table. I have no idea where the problem lies.