Issue with chemistry preprocessor

[Paul F]

Hi all,

I am currently trying to add a new tracer to CAM-Chem in CESM2.1.5. My first step to do so is to copy the chem_mech.in file from pp_trop_mam4_vbs elsewhere and modify it to add the new aerosol.

However, when doing so I encounter the following error:

ERROR: Command: '/cluster/pfarron/cesm215/components/cam/bld/configure -s -fc_type gnu -ccsm_seq -dyn fv -hgrid 0.9x1.25 -usr_src /cluster/pfarron/cesm215/cime/scripts/new_tracer_test_215/SourceMods/src.cam -spmd -nosmp -ocn docn -phys cam6 -chem trop_strat_mam4_vbs -age_of_air_trcs -usr_mech_infile /cluster/pfarron/New_tracer/chem_mech_cesm215.in' failed with error 'b'*** Chem preprocessor FAILED.

I am confused as to what are the next steps I should take to solve this issue as the error does not tell much.

Does anyone have an idea of how to solve this ?

Thanks in advance for your help,

Best,
Paul

 

[Danny Leung]

Hi Paul-
Did you reset the setup and rebuild the case? Did this error occur when you rebuild the case?
Could you upload your error file and your edited chem_mech.in? I can take a look and see if I find anything.
Danny

 

[Paul F]

Hi Danny,

Thanks again for the help !

The error occurs when rebuilding the case. I did reset and rebuild the case with:
./case.setup --reset
./case.build --clean-all
./case.build

Even with the base "chem_mech.in" it does not work.

Please find attached my log file.

Best,
Paul

 

[Danny Leung]

Hi Paul-
Hmm, if even the original chem_mech.in doesn't work, then maybe the error is not related to your implementation of new tracers. Maybe you can try creating a new case directory that works and then change the CAM_CONFIG_OPTS there before rebuilding.
But I suspect if that's the issues... because it did say there is a chem preprocessor error. I do think it's something wrong inside the modified chem_mech.in. Could you send me the original chem_mech.in and the modified chem_mech.in? I can see if I spot anything obvious from there.
It might also be helpful for you to see if there is any useful information in the following fiile...
/cluster/work/climate/pfarron/cesm215/cime/scripts/new_tracer_test_215/Buildconf/camconf/chem_proc/chem_mech.doc
Danny

 

[xiaoxiaokuishu]

嗨，保罗-
嗯，如果连原有的 chem_mech.in 文件都无法正常工作，那么错误可能与你新添加的示踪剂无关。你可以尝试创建一个新的案例目录，确保它能够正常工作，然后在重新构建之前修改该目录下的 CAM_CONFIG_OPTS 文件。
但我怀疑如果真是这个问题……因为它确实提示化学预处理器错误。我确实认为问题出在修改后的 chem_mech.in 文件内部。您能把原始的 chem_mech.in 文件和修改后的 chem_mech.in 文件都发给我吗？我看看能不能从中发现什么明显的错误。
查看以下文件或许对您有所帮助……
/cluster/work/climate/pfarron/cesm215/cime/scripts/new_tracer_test_215/Buildconf/camconf/chem_proc/chem_mech.doc
丹尼

Hi, Danny,

I also meet the same problems on archer2 (uk supercomputer), but on derecho, i work well...

...calling cam buildcpp to set build time options
ERROR: Command: '/mnt/lustre/a2fs-work2/work/n02/n02/ruxu/cesm/CESM/cesm2.2_mosaic/bld/configure -s -fc_type gnu -dyn fv -hgrid 0.9x1.25 -cpl mct -usr_src /work/n02/n02/ruxu/cesm/CESM/runs/FC-test.20260211-1812/SourceMods/src.cam -spmd -nosmp -ocn docn -phys cam6 -chem trop_strat_mam4_vbs -age_of_air_trcs -mosaic -usr_mech_infile /work/n02/n02/ruxu/cesm/CESM/RuXu/MZ198_TS1-simpleVBS_mosaic_20201210.in' failed with error '*** Chem preprocessor FAILED.
See: /mnt/lustre/a2fs-work2/work/n02/n02/ruxu/cesm/CESM/runs/FC-test.20260211-1812/Buildconf/camconf/chem_proc/chem_mech.doc' from dir '/work/n02/n02/ruxu/cesm/CESM/runs/FC-test.20260211-1812/Buildconf/camconf'

Do you have any idea of that?

Best
Ru