# Unable to download and install Kneaddata database

**URL:** <https://forum.biobakery.org/t/unable-to-download-and-install-kneaddata-database/1358>\
**Category:** KneadData\
**Created:** [November 25, 2020, 7:14pm UTC](https://forum.biobakery.org/t/unable-to-download-and-install-kneaddata-database/1358 "2020-11-25T19:14:37Z")\
**Posts on this page:** 1\
**Showing post:** 14

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**Author:** ![drelo](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.biobakery.org/drelo/32/566_2.png) [@drelo](https://forum.biobakery.org/u/drelo)\
**Post date:** [March 25, 2024, 2:31pm UTC](https://forum.biobakery.org/t/unable-to-download-and-install-kneaddata-database/1358/14 "2024-03-25T14:31:17Z")

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Hi, I am bumping this thread since I also can’t download the database,

I just installed the conda version (kneaddata v0.12.0) with mamba and did the following

` kneaddata_database --download human_genome bowtie2 KNEADDB`

I got this critical error

> Download URL: [http://huttenhower.sph.harvard.edu/kneadData\_databases/Homo\_sapiens\_hg37\_and\_human\_contamination\_Bowtie2\_v0.1.tar.gz](http://huttenhower.sph.harvard.edu/kneadData_databases/Homo_sapiens_hg37_and_human_contamination_Bowtie2_v0.1.tar.gz)  
> CRITICAL ERROR: Unable to download and extract from URL: [http://huttenhower.sph.harvard.edu/kneadData\_databases/Homo\_sapiens\_hg37\_and\_human\_contamination\_Bowtie2\_v0.1.tar.gz](http://huttenhower.sph.harvard.edu/kneadData_databases/Homo_sapiens_hg37_and_human_contamination_Bowtie2_v0.1.tar.gz)

[I even tried aria2c as a workaround as suggested here…](https://forum.biobakery.org/t/kneaddata-database-hangs-halfway-through-download/5785/2)

I also tried to manually downloading this this wget… and got

> ERROR: El certificado de «huttenhower.sph.harvard.edu» no es confiable.  
> ERROR: El certificado de «huttenhower.sph.harvard.edu» no tiene un emisor conocido.

so I guess it is a server issue…

Thanks for your help

A

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