training a classifier using HOMD database

[Nicholas_Bokulich]

@Ruby_Shi

not enough values to unpack (expected 2, got 0)

This indicates that the taxonomy file is not formatted correctly. The classifier is expecting that all taxonomies contain the same number of ranks; you probably either have one or more seqs that are missing in the taxonomy, or have incomplete taxonomic info.

See here for an example of this error:

Feature Classifier - Not enough values to unpack

Hi again, I figured out what the problem was. The imported taxonomy file is not correct and does not contain the taxonomy strings. I previously had issues importing the taxonomy using the following command: qiime tools import --type 'FeatureData[Taxonomy]' --source-format HeaderlessTSVTaxonomyFormat --input-path /shared/c3/bio_db/Phytoref/qiime2.tax.txt --output-path phytoref_taxonomy.qza I got an error saying that the file I am trying to import is not headerless, even though it clearly didn'…

Please let us know what you find! This will be useful for others who are trying to use the HOMD database.