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Ticket Resolution Summary Owner Reporter
#3533 fixed North/South halos too small for advection annette Alcide.Zhao

Dear CMS help desk,

I have a suite u-ce066 which is one of my 10 ensemble member simulations ( the other 9 have all done ). It always fails at the same point with the North/South halos too small for advection error (attached below).

According to existing tickets, this means the model becomes unstable. I have followed the instructions here (, but the model did not output useful information. I then doubted if this is because the start dumps (initial conditions) were damaged at some point, so I redownloaded the dumps and resumed the suite (rose suite-run —new) a few times. Unfortunately, it always crashes at the same point with the same error:

???!!!???!!!???!!!???!!!???!!!       ERROR        ???!!!???!!!???!!!???!!!???!!!
?  Error code: 15
?  Error from routine: LOCATE_HDPS
?  Error message: North/South halos too small for advection.
?        See the following URL for more information:
?  Error from processor: 690
?  Error number: 12

I think the other solution for this is to tweak the model parameters a bit, but I do not know how. Can you help with this, please?

Thanks a lot, Alcide

#1824 answered MONC on ARCHER: Slow Writing willie CCC_MC

I am experimenting with MONC on ARCHER. It seems like the model output is taking way too long to be completed. On average, the time required to complete the run is only 25 minutes, yet the output can take more than 50 minutes sometimes.

Please find the attached pbs output file for details for jobs. Job 3544899 is MONC run with the diagnostics files written at an interval, while Job 3540451 is another MONC run with diagnostics written in the same NetCDF file at the end of the model run.

#1858 fixed MONC Segmentation Faults um_support CCC_MC

I have been trying to run my branch on ARCHER (r756_lba_deep_conv). However, none of the job submitted was successfully run due to segmentation faults (not 11).

I have also tried running the test cases, still without success. My repository can be found on ARCHER at /work/n02/n02/cccmc825/r756_lba_deep_conv.

Any help would be appreciated.

Regards, Jonathan

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