# ImageAlgorithm backward incompatible change

**URL:** https://discourse.itk.org/t/imagealgorithm-backward-incompatible-change/1725
**Category:** Uncategorized
**Created:** [April 1, 2019, 7:13pm UTC](https://discourse.itk.org/t/imagealgorithm-backward-incompatible-change/1725 "2019-04-01T19:13:08Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![simon.rit](https://discourse.itk.org/letter_avatar_proxy/v4/letter/s/f08c70/32.png) [@simon.rit](https://discourse.itk.org/u/simon.rit)
#### Post date: [April 1, 2019, 7:13pm UTC](https://discourse.itk.org/t/imagealgorithm-backward-incompatible-change/1725/1 "2019-04-01T19:13:08Z")

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The following commit

> <https://github.com/InsightSoftwareConsortium/ITK/commit/609319760ae5c8c780c4b9be156a4a865ab79439>

  
has introduced a backward incompatible change (see for example [RTK’s issues](https://my.cdash.org/viewBuildError.php?buildid=1629388)). Is this intentional? I have the feeling that defining a default template would have avoided this… but I’m guessing I’m missing something. Thanks in advance!  
@matt.mccormick@grothausmann.roman

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### Author: ![matt.mccormick](https://discourse.itk.org/user_avatar/discourse.itk.org/matt.mccormick/32/7_2.png) [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)
#### Post date: [April 2, 2019, 3:15am UTC](https://discourse.itk.org/t/imagealgorithm-backward-incompatible-change/1725/2 "2019-04-02T03:15:16Z")

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No, the backwards incompatible change was not intentional – thanks for the report @simon.rit.

Please review this patch, which adds a compatibility function:

> <https://github.com/InsightSoftwareConsortium/ITK/pull/674>