Diversity core metrics: metadata issue

[Nicholas_Bokulich]

Hi @Cybele_C,
Here is the key error message:

@Cybele_C

None of the sample identifiers match between the metadata and the coordinates. Verify that you are using metadata and coordinates corresponding to the same dataset.

You changed the sample IDs in your mapping file — that means that they no longer correspond to any of the sample IDs used in any of your data!

Two solutions:

1. Just use the original metadata file with the original IDs.
2. Use qiime feature-table group to relabel your sample IDs in your feature table. See "option 3" in this post: Metadata Index Error - #6 by thermokarst

Good luck!