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:

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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
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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!