Python 2.7 netcdf libraries

Rose/Cylc and FCM
1

Hi community,

I have just finished porting what I believe was an ARCHER suite to ARCHER2 (cycle 7). The suite was able to compile and run the model, but the postproc_nemo/postproc_nemo_grid step failed because Python 2.7 could not find a required library. There are also a few warnings that I would like to try to fix. Do you have any idea what might be causing the issue?

[WARN] file:atmospp.nl: skip missing optional source: namelist:moose_arch
[WARN] file:nemocicepp.nl: skip missing optional source: namelist:moose_arch
[WARN] file:atmospp.nl: skip missing optional source: namelist:script_arch
[WARN] file:nemocicepp.nl: skip missing optional source: namelist:script_arch
[WARN] [SUBPROCESS]: Command: python2.7 /work/n02/n02/egavilan/cylc-run/u-du136/share/fcm_make_pp/build/bin/icb_combrest.py -f /work/n02/n02/egavilan/cylc-run/u-du136/share/data/History_Data/NEMOhist/du136o_icebergs_19610101_restart_ -n 840 -o /work/n02/n02/egavilan/cylc-run/u-du136/share/data/History_Data/NEMOhist/du136o_icebergs_19610101_restart.nc
[SUBPROCESS]: Error = 1:
Traceback (most recent call last):
File “/work/n02/n02/egavilan/cylc-run/u-du136/share/fcm_make_pp/build/bin/icb_combrest.py”, line 2, in
from netCDF4 import Dataset
File “/work/y07/shared/python/core/netcdf4/1.6.4/lib/python3.9/site-packages/netCDF4/init.py”, line 3, in
from ._netCDF4 import *
ImportError: No module named _netCDF4

[WARN] icb_combrest: Error=1
Traceback (most recent call last):
File “/work/n02/n02/egavilan/cylc-run/u-du136/share/fcm_make_pp/build/bin/icb_combrest.py”, line 2, in
from netCDF4 import Dataset
File “/work/y07/shared/python/core/netcdf4/1.6.4/lib/python3.9/site-packages/netCDF4/init.py”, line 3, in
from ._netCDF4 import *
ImportError: No module named _netCDF4

→ Failed to rebuild file: du136o_icebergs_19610101_restart
[ERROR] /work/y07/shared/umshared/nemo/utils/src/REBUILD_NEMO/BLD/bin/rebuild_nemo.exe rebuild_DU136O_ICEBERGS_19610101_RESTART: Error=1
→ Failed to rebuild file: /work/n02/n02/egavilan/cylc-run/u-du136/share/data/History_Data/NEMOhist/du136o_icebergs_19610101_restart.nc
[FAIL] Command Terminated
[FAIL] Terminating PostProc…
[FAIL] main_pp.py nemo <<‘STDIN’
[FAIL]
[FAIL] ‘STDIN’ # return-code=1
2025-11-10T21:50:22Z CRITICAL - failed/EXIT

PS: the idx is u-du136

Best regards,

Estanislao

3

Hi Estanislao,

The suite is using a very old version of ARCHER2 postproc which won’t work anymore. I’ll send over some instructions on how to upgrade it shortly.

Cheers,
Ros.

1 Like
4

Hi Estanislao,

It looks like you have been editing the suite since I looked at it first thing this morning which has made it very difficult for me to now advise.

Have you just edited the rose-app.conf files or have you run the upgrade macros?

Regards,
Ros

5

Hi Ros,

yes sorry. You mentioned that my postproc was very old so I followed this:

and then this:

finally this:

The suited was able to finish. Now I am trying to find where I sent the things….:rofl:.