Hi there, I want to run multi-instance CESM (for the test run, 2 instances) with different atmosphere initial conditions. So I first perform a hybrid run to obtain CAM initial files at different times (exp1). Then I carry out another hybrid run with 2 instances (exp2) based on the CAM initial and restart files of exp1.For exp2, the related variables in env_run.xml are set as below:
- RUN_TYPE = hybrid
- RUN_REFCASE = exp1
- RUN_REFDATE = 0001-01-03 (exp1 was run for 2 days from 0001-01-01)
- RUN_REFTOD = 00000
- GET_REFCASE = FALSE
- CONTINUE_RUN = FALSE
After ./build, I copy all the files in the exp1 restart directory to the $RUNDIR of exp2, and I am sure that two different CAM initial files (exp1.cam_0001.i.0001-01-03-00000.nc & exp1.cam_0002.i.0001-01-03-00000.nc) with required names are provided. But after I submit exp2, I get many lines of the below error in cesm.log:
- ERROR: GETFIL: FAILED to get e1.cam.i.0001-01-03-00000.nc
But in cam.buildnml.csh, I notice that below lines are included:
- if ($RUN_TYPE == 'hybrid') then
- if (-e ${RUN_REFCASE}.cam${inst_string}.i.${RUN_REFDATE}-${RUN_REFTOD}.nc) then
- set ncdata = "ncdata='${RUN_REFCASE}.cam${inst_string}.i.${RUN_REFDATE}-${RUN_REFTOD}.nc'"
- else
- set ncdata = "ncdata='${RUN_REFCASE}.cam.i.${RUN_REFDATE}-${RUN_REFTOD}.nc'"
- if ($inst_string != "") echo "WARNING: $ncdata is being used"
- endif
- endif
I do not understand why the model cannot find the 2 initial files I provided, and still try to find the default initial file, which leads to the above error. After I specify the 2 provided initial files in 2 user_nl_000* files with ncdata, the model no longer get the above error, but I get many lines of below error in the cesm.log:
- ERROR: aborting in ice-pio_ropen with invalid file
Besides, if I only run 1 instance the same way as above to specify the CAM initial file from a previous run, the model can complete successfully. Can you help me with the above 2 questions which only found in the multi-instance scenario? (1. why the model cannot recognize the 2 CAM initial files I provided before specified with ncdata, 2. why I get the ice-pio_ropen error which not happened in the single instance run) Your help will be much appreciated. Thanks!
