# dwi2response bus error

**URL:** https://community.mrtrix.org/t/dwi2response-bus-error/236
**Category:** Uncategorized
**Created:** [May 20, 2016, 11:47am UTC](https://community.mrtrix.org/t/dwi2response-bus-error/236 "2016-05-20T11:47:35Z")
**Posts on this page:** 1
**Showing post:** 15

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### Author: ![jdtournier](https://community.mrtrix.org/user_avatar/community.mrtrix.org/jdtournier/32/2594_2.png) [@jdtournier](https://community.mrtrix.org/u/jdtournier)
#### Post date: [May 10, 2018, 10:53am UTC](https://community.mrtrix.org/t/dwi2response-bus-error/236/15 "2018-05-10T10:53:39Z")

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Yes, I was going to suggest it would most likely be related to the [piping of temporary images](http://mrtrix.readthedocs.io/en/latest/getting_started/command_line.html#unix-pipelines). You’ll note that the relevant details are [described in the implementation section](http://mrtrix.readthedocs.io/en/latest/getting_started/command_line.html#how-is-it-implemented). By default, these will be written to `/tmp` on any OS other than Windows. Also check whether that location contains obsolete temporary files left behind by failed _MRtrix3_ commands:

```auto
ls /tmp/mtrix-tmp-*`

```

and remove them if you find any (assuming there are no jobs currently running…). This might explain why your commands are failing in the first place (no space left on `/tmp`). If `/tmp` is genuinely too small, try setting the `TmpFileDir` option in the config file to e.g. `.` (current folder), as suggested by @ThijsDhollander ([instructions here](http://mrtrix.readthedocs.io/en/latest/getting_started/config.html)).

I do however note that the [documentation for the TmpFileDir config option](http://mrtrix.readthedocs.io/en/latest/reference/config_file_options.html) doesn’t match [the current implementation](https://github.com/MRtrix3/mrtrix3/blob/master/core/file/utils.h#L46-L61) – but that’ll be fixed shortly.

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_[View the full topic](https://community.mrtrix.org/t/dwi2response-bus-error/236)._