# Installation on Ubuntu (GSAMethod not defined)
**URL:** https://discourse.pumas.ai/t/installation-on-ubuntu-gsamethod-not-defined/487
**Category:** Installation
**Created:** [July 16, 2021, 9:54am UTC](https://discourse.pumas.ai/t/installation-on-ubuntu-gsamethod-not-defined/487 "2021-07-16T09:54:42Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@ecomets](https://discourse.pumas.ai/u/ecomets)
#### Post date: [July 16, 2021, 9:54am UTC](https://discourse.pumas.ai/t/installation-on-ubuntu-gsamethod-not-defined/487/1 "2021-07-16T09:54:42Z")
Hi all,
I’m more of an R user so Julia is a bit new to me. I followed the instructions here to install Julia and Pumas:
> **[Pumas AI](https://pumas.ai/products/pumas/instructions/linux/)**
>
> Pharmaceutical Modeling and Simulation
I use atom to run julia and followed the Gui-version.
However, trying to execute:
using Pumas
gives me the following error message:
[Info: Precompiling PumasPlots [0c61e9cd-e02e-46f2-b961-0746d5a16e3b]
ERROR: LoadError: LoadError: UndefVarError: GSAMethod not defined
(and a StackTrace not shown)
(on the plus side I do seem to have Pumas, on the minus side it doesn’t compile)
Can someone kindly point me to the right way to get a working Pumas with Ubuntu ?
(In [another post](https://discourse.pumas.ai/t/precompilation-error-gsamethod-not-defined/463/4) someone suggested this could be linked to a version of another package (DiffEqSensitivity), my version seems to be:
DiffEqSensitivity v6.50.0
but I don’t know how to downgrade to a previous version or which previous version to use to test that solution).
Thanks,
Emmanuelle
---
### Author:  [@andreasnoack](https://discourse.pumas.ai/u/andreasnoack)
#### Post date: [July 16, 2021, 10:22am UTC](https://discourse.pumas.ai/t/installation-on-ubuntu-gsamethod-not-defined/487/2 "2021-07-16T10:22:32Z")
Hi Emmanuelle,
Thanks for reaching out. The version of Pumas that you are trying to use is a bit out of date. In fact, it’s been a while since we stopped supporting the Linux binaries and you’ll notice that they are not listed on [https://pumas.ai/products/pumas/download](https://pumas.ai/products/pumas/download). The most recent versions of Pumas are now offered as a software service on [juliahub.com](http://juliahub.com). Please reach out to sales@pumas.ai if you are interested in getting access. It’s free for academic use.
Best
Andreas Noack
---
### Author:  [@ecomets](https://discourse.pumas.ai/u/ecomets)
#### Post date: [July 16, 2021, 10:42am UTC](https://discourse.pumas.ai/t/installation-on-ubuntu-gsamethod-not-defined/487/3 "2021-07-16T10:42:19Z")
Thank you so much for your quick response ! I will send them an email 🙂
Have a nice day,
Emmanuelle