# Core Dumped During Visualizations

**URL:** https://forum.qiime2.org/t/core-dumped-during-visualizations/669
**Category:** User Support
**Tags:** matplotlib
**Created:** [June 7, 2017, 4:26pm UTC](https://forum.qiime2.org/t/core-dumped-during-visualizations/669 "2017-06-07T16:26:01Z")
**Posts on this page:** 1
**Showing post:** 3

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### Author: ![thermokarst](https://forum.qiime2.org/letter_avatar_proxy/v4/letter/t/8e7dd6/32.png) [@thermokarst](https://forum.qiime2.org/u/thermokarst)
#### Post date: [June 8, 2017, 4:18am UTC](https://forum.qiime2.org/t/core-dumped-during-visualizations/669/3 "2017-06-08T04:18:12Z")

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Hi @Shawn_Rupp! Sorry to hear you're having troubles. By any chance are you running this on a [headless server](https://forum.qiime2.org/t/qiime-tools-view-on-headless-server/113/2)? If so, this looks like the kind of thing that matplotlib will complain about if it doesn't have a display configured to use (for example, SSH without X forwarding). You can [configure matplotlib](https://matplotlib.org/users/customizing.html) to use an offscreen backend, see [this forum post](https://forum.qiime2.org/t/error-in-qiime-feature-table-summarize/308/2) for an example. Hope that helps!

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