plumber2_surf_wrapper: Some files not produced

[samsrabin]

Brief summary of bug

plumber2_surf_wrapper is supposed to create a surface dataset file for each site in tools/site_and_regional/PLUMBER2_sites.csv. However, some are silently skipped.

General bug information

CTSM version you are using: Commit 761bb47 on the branch at PR #3259. (Based on ctsm5.3.056, but that tag would throw a different error without the fixes on that commit.)

Does this bug cause significantly incorrect results in the model's science? No

Configurations affected: n/a

Important details of your setup / configuration so we can reproduce the bug

Run

cd tools/site_and_regional
rm -rf subset_data_single_point
./plumber2_surf_wrapper
ls subset_data_single_point | wc -l

That last line counts the number of files in subset_data_single_point/. There should be 170, but there are only 62.