# Running the stack on HSC data for a DESC PSF project

**URL:** <https://www.rubin.community/t/running-the-stack-on-hsc-data-for-a-desc-psf-project/964>\
**Category:** Support\
**Tags:** hsc, desc, psf\
**Created:** [July 21, 2016, 3:15pm UTC](https://www.rubin.community/t/running-the-stack-on-hsc-data-for-a-desc-psf-project/964 "2016-07-21T15:15:29Z")\
**Posts on this page:** 1\
**Showing post:** 23

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**Author:** ![fjaviersanchez](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/fjaviersanchez/32/692_2.png) [@fjaviersanchez](https://www.rubin.community/u/fjaviersanchez)\
**Post date:** [September 19, 2016, 9:44pm UTC](https://www.rubin.community/t/running-the-stack-on-hsc-data-for-a-desc-psf-project/964/23 "2016-09-19T21:44:17Z")

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What is the easiest/cleanest way to update GalSim to deal with this problem?

I tried to follow the instructions in [here](http://www.rubin.community/t/installing-running-conda-sims-stack-replacing-a-package-with-the-git-repo-version/709/2) but, even if the correct version appeared when I did `eups list -s`, when I tried to do `import galsim` it didn’t work. I also tried doing `eups distrib install` with the latest weekly release but, when I tried to use it in combination with other packages (that worked fine with `v12_0`) I had a strange memory allocation problem when using galsim inside an ipython notebook.

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