# taxa barplot (barchart) error
**URL:** https://forum.qiime2.org/t/taxa-barplot-barchart-error/27255
**Category:** User Support
**Tags:** taxonomy, feature-classifier, taxa, barplot
**Created:** [July 31, 2023, 6:50am UTC](https://forum.qiime2.org/t/taxa-barplot-barchart-error/27255 "2023-07-31T06:50:32Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@Carlita](https://forum.qiime2.org/u/Carlita)
#### Post date: [July 31, 2023, 6:50am UTC](https://forum.qiime2.org/t/taxa-barplot-barchart-error/27255/1 "2023-07-31T06:50:33Z")
Hello, I need help.
The results that need to come out as bacteria from the barchart analyzed as Archaea according to the command tool .
In addition, when the samples that came out well as bacteria are turned along with the samples that came out as Archaea, it also comes out as Archaea.
I asked the company I sequenced and found that the sample was made up of bacteria without any Archaea.
I can't find the cause.
I analyzed using dada2 and used silva-138-99-nb-classifier.qza.
Thank you.
It is a result that came out bacteria. (fig.1)
It is a result that came out Archaea including (fig.1) results.
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### Author:  [@crusher083](https://forum.qiime2.org/u/crusher083)
#### Post date: [July 31, 2023, 11:02am UTC](https://forum.qiime2.org/t/taxa-barplot-barchart-error/27255/2 "2023-07-31T11:02:13Z")
Hello and welcome to :qiime2:!
I expect it might be an error of a classifier. Try to find your primers and create a custom classifier using tutorial: [Processing, filtering, and evaluating the SILVA database (and other reference sequence data) with RESCRIPt](https://forum.qiime2.org/t/processing-filtering-and-evaluating-the-silva-database-and-other-reference-sequence-data-with-rescript/15494)
Cheers
V
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### Author:  [@Carlita](https://forum.qiime2.org/u/Carlita)
#### Post date: [August 10, 2023, 1:29pm UTC](https://forum.qiime2.org/t/taxa-barplot-barchart-error/27255/3 "2023-08-10T13:29:14Z")
I am rebuilding Silva data through the link you sent me.
But it has a problem.
In Import SILVA files into QIIME 2 step, An error " 'utf-8' codec can't decode byte 0x8b in position 1: invalid start byte " appears.
I referred to the forum, but found no solution.
How should I do it?
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### Author:  [@SoilRotifer](https://forum.qiime2.org/u/SoilRotifer)
#### Post date: [August 10, 2023, 1:57pm UTC](https://forum.qiime2.org/t/taxa-barplot-barchart-error/27255/4 "2023-08-10T13:57:16Z")
Hi @Carlita, can you provide the exact command you are running when you encounter this error?
It sounds like you are running the semi-manual approach of importing SILVA data. You can skip all of that and simply run the commands starting with the `qiime rescript get-silva-data ...` step. This command wraps most of the commands under "The gritty details" section. The commands provided under that section are provided in case there is a version of SILVA that we do not provide automated access too via the `get-silva-data` action, _i.e._ where you can specify the recent versions of SILVA.
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### Author:  [@Carlita](https://forum.qiime2.org/u/Carlita)
#### Post date: [August 11, 2023, 1:14am UTC](https://forum.qiime2.org/t/taxa-barplot-barchart-error/27255/5 "2023-08-11T01:14:38Z")
Hello! Thank you for answering.
I used this command.
qiime tools import
--type 'FeatureData[SILVATaxonomy]'
--input-path tax\_slv\_ssu\_138.1.txt
--output-path taxranks-silva-138.1-ssu-nr99.qza \
Thank you!
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### Author:  [@SoilRotifer](https://forum.qiime2.org/u/SoilRotifer)
#### Post date: [August 11, 2023, 1:00pm UTC](https://forum.qiime2.org/t/taxa-barplot-barchart-error/27255/6 "2023-08-11T13:00:35Z")
> [@Carlita](#):
>
> qiime tools import
> --type 'FeatureData[SILVATaxonomy]'
> --input-path tax\_slv\_ssu\_138.1.txt
> --output-path taxranks-silva-138.1-ssu-nr99.qza
Hi @Carlita,
I was able to successfully run this command without any issues, and I was unable to replicate the error.
What version of QIIME 2 are you running? The latest version of RESCRIPt will run with the latest version of QIIME 2. You can install older versions of RESCRIPt, for the specific version of QIIME 2 you are running. These are available on the RESCRIPt GitHub page.
-Mike
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### Author:  [@system](https://forum.qiime2.org/u/system)
#### Post date: [September 11, 2023, 7:01pm UTC](https://forum.qiime2.org/t/taxa-barplot-barchart-error/27255/7 "2023-09-11T19:01:00Z")
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