# Questions about metaphlan --install **URL:** \ **Category:** MetaPhlAn\ **Created:** [August 8, 2020, 10:51am UTC](https://forum.biobakery.org/t/questions-about-metaphlan-install/830 "2020-08-08T10:51:25Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![wangzhenyu](https://avatars.discourse-cdn.com/v4/letter/w/49beb7/32.png) [@wangzhenyu](https://forum.biobakery.org/u/wangzhenyu)\ **Post date:** [August 8, 2020, 10:51am UTC](https://forum.biobakery.org/t/questions-about-metaphlan-install/830/1 "2020-08-08T10:51:25Z")
Hi, this is the first time I try to use metaphlan3 and have no experience of using older version. I install the metaphlan3 through conda. The install code is as following: conda create --name metaphlan -c bioconda python=3.7 metaphlan and the install succeed, Then i try to download database, and the code is as following: (metaphlan) wangzhenyu@wangzhenyudeMacBook-Pro ~ % metaphlan --install Downloading MetaPhlAn database Please note due to the size this might take a few minutes File /Users/wangzhenyu/opt/miniconda3/envs/metaphlan/lib/python3.7/site-packages/metaphlan/metaphlan\_databases/mpa\_v30\_CHOCOPhlAn\_201901.tar already present! File /Users/wangzhenyu/opt/miniconda3/envs/metaphlan/lib/python3.7/site-packages/metaphlan/metaphlan\_databases/mpa\_v30\_CHOCOPhlAn\_201901.md5 already present! MD5 checksums do not correspond! If this happens again, you should remove the database files and rerun MetaPhlAn so they are re-downloaded i have checked the forum and related question, but i still could not solve this problem. ---
**Author:** ![fbeghini](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.biobakery.org/fbeghini/32/81_2.png) [@fbeghini](https://forum.biobakery.org/u/fbeghini)\ **Post date:** [August 10, 2020, 7:57am UTC](https://forum.biobakery.org/t/questions-about-metaphlan-install/830/2 "2020-08-10T07:57:07Z")
Have you tried removing the tar and md5 files? What version are you running?