# Error during registration

**URL:** <https://discourse.itk.org/t/error-during-registration/1510>\
**Category:** Beginner Questions\
**Created:** [January 8, 2019, 10:09am UTC](https://discourse.itk.org/t/error-during-registration/1510 "2019-01-08T10:09:02Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ChanghongLi](https://discourse.itk.org/letter_avatar_proxy/v4/letter/c/a88e57/32.png) [@ChanghongLi](https://discourse.itk.org/u/ChanghongLi)\
**Post date:** [January 8, 2019, 10:09am UTC](https://discourse.itk.org/t/error-during-registration/1510/1 "2019-01-08T10:09:02Z")

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**Dear experts,**

**Now I am using ANTS toolbox, which is based on the ITK, to registe my images to the template but i found the following error:**  
\*\*\*\*=============================================================== \*\*\*\*  
**WARNING: In /usr/include/ITK-4.10/itkTransformFactoryBase.h, line 81  
 TransformFactoryBase (0x555e9eb4e430): Refusing to register transform “MatrixOffsetTransformBase\_double\_3\_3” again!  
\*\*\*\*=============================================**================== \*\*

**Does anyone has idea about it? Any suggestions would be greatly appreciated! Thanks in advance!**

**With best,**  
**Changhong**

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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:** [January 8, 2019, 10:57pm UTC](https://discourse.itk.org/t/error-during-registration/1510/2 "2019-01-08T22:57:22Z")

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Hi @ChanghongLi,

This may be specific to how ANTS is being invoked and using ITK. Providing a detailed, reproducible description of the command line arguments and input images, and the ANTS version used on the ANTs issue tracker will provide enough information to understand the issue:

[https://github.com/ANTsX/ANTs/issues](https://github.com/ANTsX/ANTs/issues)

HTH,  
Matt

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**Author:** ![ChanghongLi](https://discourse.itk.org/letter_avatar_proxy/v4/letter/c/a88e57/32.png) [@ChanghongLi](https://discourse.itk.org/u/ChanghongLi)\
**Post date:** [January 9, 2019, 2:38pm UTC](https://discourse.itk.org/t/error-during-registration/1510/3 "2019-01-09T14:38:32Z")

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Many thanks for your reply.

With best,  
Changhong