# IPFX 1.0.4 Release - Notice for involved

**URL:** <https://community.brain-map.org/t/ipfx-1-0-4-release-notice-for-involved/1212>\
**Category:** Technical\
**Tags:** electrophysiology, celltype, allensdk\
**Created:** [July 29, 2021, 6:26pm UTC](https://community.brain-map.org/t/ipfx-1-0-4-release-notice-for-involved/1212 "2021-07-29T18:26:22Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![MatthewAitken](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.brain-map.org/matthewaitken/32/325_2.png) [@MatthewAitken](https://community.brain-map.org/u/MatthewAitken)\
**Post date:** [July 29, 2021, 6:26pm UTC](https://community.brain-map.org/t/ipfx-1-0-4-release-notice-for-involved/1212/1 "2021-07-29T18:26:22Z")

</div>

IPFX 1.0.3 was released 7/29/2021  
Changed:

- selects recording rather than sweep epoch by default
- restructures epoch detection to use recording epoch for stim epoch detection
- Use NaNs instead of truncating

Bug fixes:

- Round the duration calculation in `run_feature_vector_extraction` so that  
vectors of the same length are produced even when floating point approximations  
of times are different.