# Construction of bump files from yaml

**URL:** <https://forums.jcsda.org/t/construction-of-bump-files-from-yaml/58>\
**Category:** JEDI\
**Created:** [December 29, 2020, 4:05am UTC](https://forums.jcsda.org/t/construction-of-bump-files-from-yaml/58 "2020-12-29T04:05:05Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![benjaminmenetrier](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.jcsda.org/benjaminmenetrier/32/9_2.png) [@benjaminmenetrier](https://forums.jcsda.org/u/benjaminmenetrier)\
**Post date:** [January 7, 2021, 9:31am UTC](https://forums.jcsda.org/t/construction-of-bump-files-from-yaml/58/2 "2021-01-07T09:31:13Z")

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Hi @andytangborn. Thanks for posting your feedback on the JEDI forum.

The answer to your question might be partially found in [this email exchange](https://forums.jcsda.org/t/failure-of-bumpparameters-nicas-gfs-aero-at-c96/55/9) I just copied/pasted on the forum. And the NICAS files read in `hyb-3dvar_gfs_aero` for the localization have the following path:

```auto
${datadir}/${prefix}_${number_of_MPI_tasks}-${index_of_the_current_MPI_task}.nc

```

As you noticed, there are some inconsistencies in the `bumpparameters_nicas_gfs_aero.yaml` configuration file (incorrect `prefix` key with a missing “o” [here](https://github.com/JCSDA-internal/fv3-jedi/blob/c88d93317a9bbcb0f2c090e27ba0c1a70e9235d6/test/testinput/bumpparameters_nicas_gfs_aero.yaml#L28)). Moreover, the output data produced by this test are not used in other tests. Indeed, since we use fixed length-scales for the NICAS localization, the `hyb-3dvar_gfs_aero` test uses the output data of the `bumpparameters_nicas_gfs` test.

I will try to clean up the “aero” configuration files, which are currently misleading. However, such a modification will not be merged into `develop` before Februrary, since @danholdaway is on paternity leave.

Please let me know if you need any further assistance.  
Benjamin

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