Taxonomic analysis output visualizations error

I am using QIIME2 2019.1 on server, system:Linux Ubuntu 16.04 LTS.
I was running the following command:
qiime metadata tabulate
--m-input-file taxonomy.qza
--o-visualization taxonomy.qzv
and then I encountered the following errors:

before this step, i used the classifier "silva-132-99-515-806-nb-classifier.qza" download from data resources page(Data resources — QIIME 2 2019.1.0 documentation) to output the artifact file "taxonomy.qza", and no errors are reported.

should i try this step again? or something was wrong?

Hi @DKZ,
We have seen this error reported a few times with SILVA. This is an issue with how SILVA is formatted: trailing whitespace in the SILVA taxonomy labels causes this issue, as the error message reports.

The easiest thing to do is just remove all trailing whitespace before importing and using the SILVA database.

Here is another workaround that will allow you to use your current data:

it’s working ! thanks for your help!!!

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