# Warning starting DADA2

**URL:** https://forum.qiime2.org/t/warning-starting-dada2/2281
**Category:** User Support
**Tags:** dada2
**Created:** [December 19, 2017, 6:17pm UTC](https://forum.qiime2.org/t/warning-starting-dada2/2281 "2017-12-19T18:17:31Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![RuneGronseth](https://forum.qiime2.org/letter_avatar_proxy/v4/letter/r/d78d45/32.png) [@RuneGronseth](https://forum.qiime2.org/u/RuneGronseth)
#### Post date: [December 19, 2017, 6:17pm UTC](https://forum.qiime2.org/t/warning-starting-dada2/2281/1 "2017-12-19T18:17:32Z")

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Hi,  
When running this command:

I get these warnings:

 ![image](https://forum-qiime2-org.s3.dualstack.us-west-2.amazonaws.com/original/1X/3940640b4c559c61050250d9d58d654456c84a67.png)

Can they be ignored?

Best wishes Rune

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### Author: ![colinbrislawn](https://forum.qiime2.org/user_avatar/forum.qiime2.org/colinbrislawn/32/6221_2.png) [@colinbrislawn](https://forum.qiime2.org/u/colinbrislawn)
#### Post date: [December 19, 2017, 8:37pm UTC](https://forum.qiime2.org/t/warning-starting-dada2/2281/2 "2017-12-19T20:37:19Z")

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Hello Rune,

Thanks for posting. In general, **warnings** are a friendly reminder about possible issues, while **errors** are problems that needs to be fixed. Let's see what the dada2 developers have to say about these warning, but for now you can continue with you analysis.

I'm glad to see you trying out Qiime 2. Keep in touch,

Colin

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### Author: ![jairideout](https://forum.qiime2.org/user_avatar/forum.qiime2.org/jairideout/32/9_2.png) [@jairideout](https://forum.qiime2.org/u/jairideout)
#### Post date: [December 19, 2017, 11:24pm UTC](https://forum.qiime2.org/t/warning-starting-dada2/2281/4 "2017-12-19T23:24:28Z")

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Hi @RuneGronseth! Just to add to @colinbrislawn's reply: I've seen these warnings appear in many forum posts containing DADA2 output similar to what you have. I think they can be ignored -- @benjjneb, does that sound right?

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### Author: ![thermokarst](https://forum.qiime2.org/letter_avatar_proxy/v4/letter/t/8e7dd6/32.png) [@thermokarst](https://forum.qiime2.org/u/thermokarst)
#### Post date: [December 19, 2017, 11:31pm UTC](https://forum.qiime2.org/t/warning-starting-dada2/2281/7 "2017-12-19T23:31:58Z")

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Related to this discussion, the upcoming release of QIIME 2 2017.12 will suppress many (or most) of those emitted warnings! This was [added](https://forum.qiime2.org/t/preview-qiime-2-2017-12-development-changelog/2032) while we were upgrading the version of DADA2 that is shipped with QIIME 2.

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### Author: ![system](https://forum-qiime2-org.s3.dualstack.us-west-2.amazonaws.com/original/3X/2/1/21af5fe23cb6f4579467c66a9ed94e55274ca7bd.svg) [@system](https://forum.qiime2.org/u/system)
#### Post date: [January 23, 2018, 12:24am UTC](https://forum.qiime2.org/t/warning-starting-dada2/2281/9 "2018-01-23T00:24:25Z")

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