# Install freefem 4.9

**URL:** <https://community.freefem.org/t/install-freefem-4-9/2966>\
**Category:** FreeFEM installation\
**Created:** [February 14, 2024, 8:20pm UTC](https://community.freefem.org/t/install-freefem-4-9/2966 "2024-02-14T20:20:18Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![DongweiYe](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/dongweiye/32/1073_2.png) [@DongweiYe](https://community.freefem.org/u/DongweiYe)\
**Post date:** [February 14, 2024, 8:20pm UTC](https://community.freefem.org/t/install-freefem-4-9/2966/1 "2024-02-14T20:20:18Z")

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Hi,

I am trying to install the Freefem 4.9 version. However, I met some issue, saying

```auto
Installing ARPACK version 3.8.0... 
ERROR: Unable to download package ARPACK from: https://github.com/prj-/arpack-ng/archive/b64dccb.tar.gz
* If URL specified manually - perhaps there is a typo?

```

It seems some files have been removed from Github and can’t be downloaded now. But I need that specific version of Freefem. Is there an alternative to resolve this?

Thank you!

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**Author:** ![prj](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@prj](https://community.freefem.org/u/prj)\
**Post date:** [February 14, 2024, 8:26pm UTC](https://community.freefem.org/t/install-freefem-4-9/2966/2 "2024-02-14T20:26:08Z")

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Why do you need that specific version? You could try changing `--download-arpack` in `3rdparty/ff-petsc/Makefile` to `--download-arpack=https://github.com/opencollab/arpack-ng/archive/refs/tags/3.9.1.tar.gz`.

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<div class="post-metadata">

**Author:** ![prj](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@prj](https://community.freefem.org/u/prj)\
**Post date:** [February 14, 2024, 8:26pm UTC](https://community.freefem.org/t/install-freefem-4-9/2966/3 "2024-02-14T20:26:42Z")

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Or you could remove `--download-arpack` if it fails.

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<div class="post-metadata">

**Author:** ![DongweiYe](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/dongweiye/32/1073_2.png) [@DongweiYe](https://community.freefem.org/u/DongweiYe)\
**Post date:** [February 14, 2024, 9:58pm UTC](https://community.freefem.org/t/install-freefem-4-9/2966/4 "2024-02-14T21:58:04Z")

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Thank you so much! Its resolved!