# Dwi2response error -voxels command not recognized

**URL:** <https://community.mrtrix.org/t/dwi2response-error-voxels-command-not-recognized/4339>\
**Category:** Uncategorized\
**Created:** [December 1, 2020, 12:35pm UTC](https://community.mrtrix.org/t/dwi2response-error-voxels-command-not-recognized/4339 "2020-12-01T12:35:16Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![inbar\_meningher](https://community.mrtrix.org/user_avatar/community.mrtrix.org/inbar_meningher/32/3085_2.png) [@inbar\_meningher](https://community.mrtrix.org/u/inbar_meningher)\
**Post date:** [December 1, 2020, 12:35pm UTC](https://community.mrtrix.org/t/dwi2response-error-voxels-command-not-recognized/4339/1 "2020-12-01T12:35:16Z")

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Hi, when I try to run dwi2response function with the -voxels command I get an error- unrecognized argument. What can be the problem and how do I solve it?

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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:** [December 1, 2020, 3:28pm UTC](https://community.mrtrix.org/t/dwi2response-error-voxels-command-not-recognized/4339/2 "2020-12-01T15:28:04Z")

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Hi Inbar,

Could it be that you’re using an old version of the software? What does `dwi2response -version` report?

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**Author:** ![inbar\_meningher](https://community.mrtrix.org/user_avatar/community.mrtrix.org/inbar_meningher/32/3085_2.png) [@inbar\_meningher](https://community.mrtrix.org/u/inbar_meningher)\
**Post date:** [December 2, 2020, 10:43am UTC](https://community.mrtrix.org/t/dwi2response-error-voxels-command-not-recognized/4339/3 "2020-12-02T10:43:09Z")

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![image](https://community.mrtrix.org/uploads/default/original/2X/5/5a3aed5479fe3f498d48efbac0d0d8da003ff39e.png)

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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:** [December 2, 2020, 10:43am UTC](https://community.mrtrix.org/t/dwi2response-error-voxels-command-not-recognized/4339/4 "2020-12-02T10:43:42Z")

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Sorry, I’m after the output of this specific command:

```auto
dwi2response -version

```

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<div class="post-metadata">

**Author:** ![inbar\_meningher](https://community.mrtrix.org/user_avatar/community.mrtrix.org/inbar_meningher/32/3085_2.png) [@inbar\_meningher](https://community.mrtrix.org/u/inbar_meningher)\
**Post date:** [December 6, 2020, 3:02pm UTC](https://community.mrtrix.org/t/dwi2response-error-voxels-command-not-recognized/4339/5 "2020-12-06T15:02:14Z")

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![image](https://community.mrtrix.org/uploads/default/original/2X/1/1e30a87a59f6ae18dfedc1626331f57ffbb889ba.png)

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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:** [December 6, 2020, 3:04pm UTC](https://community.mrtrix.org/t/dwi2response-error-voxels-command-not-recognized/4339/6 "2020-12-06T15:04:00Z")

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No problem there – but looking at your screenshots more closely, I think this might be the dreaded long dash problem again! See [this post for details](https://community.mrtrix.org/t/trouble-with-mrmath/4158/2)…

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**Author:** ![inbar\_meningher](https://community.mrtrix.org/user_avatar/community.mrtrix.org/inbar_meningher/32/3085_2.png) [@inbar\_meningher](https://community.mrtrix.org/u/inbar_meningher)\
**Post date:** [December 7, 2020, 2:38pm UTC](https://community.mrtrix.org/t/dwi2response-error-voxels-command-not-recognized/4339/7 "2020-12-07T14:38:44Z")

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yessss thank you! that was it!!!