# Error installing --bowtie2db

**URL:** <https://forum.biobakery.org/t/error-installing-bowtie2db/1481>\
**Category:** MetaPhlAn\
**Created:** [December 30, 2020, 5:29pm UTC](https://forum.biobakery.org/t/error-installing-bowtie2db/1481 "2020-12-30T17:29:04Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ivan](https://avatars.discourse-cdn.com/v4/letter/i/df788c/32.png) [@ivan](https://forum.biobakery.org/u/ivan)\
**Post date:** [December 30, 2020, 5:29pm UTC](https://forum.biobakery.org/t/error-installing-bowtie2db/1481/1 "2020-12-30T17:29:04Z")

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Hello all,

After installing Metaphlan using Anaconda I cannot install the database bowtie2db. I get this message:

metaphlan --install --bowtie2db /home/Documents/  
ValueError: numpy.ndarray size changed may indicate binary incompatibility. Expected 88 from C header, got 80 from PyObject.

Version used:  
Python:3.8  
Numpy: 1.19.4

Can someone help me?

Thanks

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**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:** [January 5, 2021, 9:37am UTC](https://forum.biobakery.org/t/error-installing-bowtie2db/1481/2 "2021-01-05T09:37:06Z")

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Hi,  
I never encountered this kind of error with MetaPhlAn, have you tried to perform a clean installation using Python 3.7?

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**Author:** ![ivan](https://avatars.discourse-cdn.com/v4/letter/i/df788c/32.png) [@ivan](https://forum.biobakery.org/u/ivan)\
**Post date:** [January 6, 2021, 12:56pm UTC](https://forum.biobakery.org/t/error-installing-bowtie2db/1481/3 "2021-01-06T12:56:42Z")

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Thanks. Installing with Python 3.7 fixed the issue