# Fixelcfetstats: no streamlines connectivitiy for some fixels

**URL:** <https://community.mrtrix.org/t/fixelcfetstats-no-streamlines-connectivitiy-for-some-fixels/8758>\
**Category:** Uncategorized\
**Created:** [May 7, 2026, 8:02pm UTC](https://community.mrtrix.org/t/fixelcfetstats-no-streamlines-connectivitiy-for-some-fixels/8758 "2026-05-07T20:02:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![iqraalimirza16](https://community.mrtrix.org/user_avatar/community.mrtrix.org/iqraalimirza16/32/5447_2.png) [@iqraalimirza16](https://community.mrtrix.org/u/iqraalimirza16)\
**Post date:** [May 7, 2026, 8:02pm UTC](https://community.mrtrix.org/t/fixelcfetstats-no-streamlines-connectivitiy-for-some-fixels/8758/1 "2026-05-07T20:02:46Z")

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![image](https://community.mrtrix.org/uploads/default/original/2X/c/c8dcda8347308aa75e6291c7b97ac7ea0baad472.jpeg)

Hey all, I completed steps for the whole brain FBA following this tutorial: [Fibre density and cross-section - Multi-tissue CSD — MRtrix3 3.0 documentation](https://mrtrix.readthedocs.io/en/latest/fixel_based_analysis/mt_fibre_density_cross-section.html)

While running fixelcfestats I get this warning which I am unsure about, could it mean there were some issues in the previous steps perhaps? Is this an issue?

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**Author:** ![szan](https://community.mrtrix.org/user_avatar/community.mrtrix.org/szan/32/5241_2.png) [@szan](https://community.mrtrix.org/u/szan)\
**Post date:** [May 21, 2026, 5:54am UTC](https://community.mrtrix.org/t/fixelcfetstats-no-streamlines-connectivitiy-for-some-fixels/8758/2 "2026-05-21T05:54:17Z")

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Hi iqraalimirza16,

I think [this conversation](https://community.mrtrix.org/t/fixelcfestats-concerns/5413) will help.

Simone