# Error: QXcbConnection: Could not connect to display

**URL:** https://forum.qiime2.org/t/error-qxcbconnection-could-not-connect-to-display/441
**Category:** User Support
**Created:** [March 14, 2017, 4:26pm UTC](https://forum.qiime2.org/t/error-qxcbconnection-could-not-connect-to-display/441 "2017-03-14T16:26:57Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![linneakh](https://forum.qiime2.org/user_avatar/forum.qiime2.org/linneakh/32/87_2.png) [@linneakh](https://forum.qiime2.org/u/linneakh)
#### Post date: [March 14, 2017, 4:26pm UTC](https://forum.qiime2.org/t/error-qxcbconnection-could-not-connect-to-display/441/1 "2017-03-14T16:26:57Z")

</div>

My university just downloaded qiime 2 to their hpc system. I am trying the following command:

```auto
qiime demux summarize --i-data demux.qza --o-visualization demux.qzv --verbose

```

And keep getting the following error:

```auto
QXcbConnection: Could not connect to display
Aborted

```

Can anyone help?

Thanks,

Linnea

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<div class="post-metadata">

### Author: ![linneakh](https://forum.qiime2.org/user_avatar/forum.qiime2.org/linneakh/32/87_2.png) [@linneakh](https://forum.qiime2.org/u/linneakh)
#### Post date: [March 14, 2017, 5:27pm UTC](https://forum.qiime2.org/t/error-qxcbconnection-could-not-connect-to-display/441/2 "2017-03-14T17:27:14Z")

</div>

Thank you, but I found a solution in a previous post!

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<div class="post-metadata">

### Author: ![thermokarst](https://forum.qiime2.org/letter_avatar_proxy/v4/letter/t/8e7dd6/32.png) [@thermokarst](https://forum.qiime2.org/u/thermokarst)
#### Post date: [March 14, 2017, 5:28pm UTC](https://forum.qiime2.org/t/error-qxcbconnection-could-not-connect-to-display/441/3 "2017-03-14T17:28:08Z")

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Thanks @linneakh - can you link to the post that you found useful? It would help future users who see your post know how you solved your problem. Thanks!

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<div class="post-metadata">

### Author: ![linneakh](https://forum.qiime2.org/user_avatar/forum.qiime2.org/linneakh/32/87_2.png) [@linneakh](https://forum.qiime2.org/u/linneakh)
#### Post date: [March 14, 2017, 5:59pm UTC](https://forum.qiime2.org/t/error-qxcbconnection-could-not-connect-to-display/441/4 "2017-03-14T17:59:05Z")

</div>

Here is a link the previous post where I found the solution to the problem I stated above.

[https://forum.qiime2.org/t/error-converting-qza-to-qzv-on-cluster/354?u=linneakh](https://forum.qiime2.org/t/error-converting-qza-to-qzv-on-cluster/354)