CAM build-namelist - ERROR: No default value found for ncdata

[HU lei]

Dear all,
I am a new user working with CESM2, Recently, I choose BC5L45BGC component and f09_g16 grids for test . However, when I change RUN_TYPE = branch , RUN_REFDATE=1981-09-01, RUN_STARTDATE=1981-09-01, and build the simulation, I get the error message:

ERROR:
"Building case in directory /public1/home/duanws/CESM2.1.1/cime/scripts/6B82G
sharedlib_only is False
model_only is False
Generating component namelists as part of build
GET_REFCASE is false, the user is expected to stage the refcase to the run directory.
Creating component namelists
Calling /public1/home/duanws/CESM2.1.1/components/cam//cime_config/buildnml
...calling cam buildcpp to set build time options
ERROR: Command /public1/home/duanws/CESM2.1.1/components/cam/bld/build-namelist -ntasks 224 -csmdata /public1/home/duanws/inputdata -infile /public1/home/duanws/CESM2.1.1/cime/scripts/6B82G/Buildconf/camconf/namelist -ignore_ic_year -inputdata /public1/home/duanws/CESM2.1.1/cime/scripts/6B82G/Buildconf/cam.input_data_list -namelist " &atmexp /" failed rc=255
out=CAM build-namelist - ERROR: No default value found for ncdata
user defined attributes:
key=ic_md val=19820901
err=Died at /public1/home/duanws/CESM2.1.1/components/cam/bld/build-namelist line 4047."



But when I change 1981-09-01 to 1981-08-01 or 1981-07-01.....,it will build successful, only September failed
I have no idea how to fix this problem. Is there anyone can help me or give me any hint? Thank you very much.

Regards,
HU

 

[hannay]

Please could you make sure that the restart files are copied over in the run directory.
Please could look in the run directory and see if you have a file *cam.i.1981-01-01*. If not this is the issue.

 

[HU lei]

Thank you very much for your reply. But I have this file in my run directory.When I change RUN_REFDATE = 1982-09-01, RUN_STARTDATE="1982-08-01.it will build successful, However, change RUN_REFDATE = 1982-08-01, RUN_STARTDATE="1982-09-01 it will fail.

 

[hannay]

Try to set: ncdata = BCnud_final.cam.i.1980-01-01-00000.nc

For default the cam.i is output yearly. This is why you only have a cam.i for 1980-01-01
If you need the ic monthly instead of yearly, you can change the output frquency of the cam.i file with the namelist variable:
inithist

You can look for the setting of the is variable at: CESM2 CAM6.3 Namelist Definitions

inithist	cam_history_nl	history	char*8
Valid Values ['NONE', '6-HOURLY', 'DAILY', 'MONTHLY', 'YEARLY', 'CAMIOP', 'ENDOFRUN'] Possible Default Values Description and out-of-the-box DefaultFrequency that initial files will be output: 6-hourly, daily, monthly, yearly, or never. Valid values: 'NONE', '6-HOURLY', 'DAILY', 'MONTHLY', 'YEARLY', 'CAMIOP', 'ENDOFRUN'. Default: 'YEARLY'