# T2 mapping error

**URL:** <https://discourse.slicer.org/t/t2-mapping-error/16806>\
**Category:** Support\
**Created:** [March 28, 2021, 9:07pm UTC](https://discourse.slicer.org/t/t2-mapping-error/16806 "2021-03-28T21:07:21Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![selmanca](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/selmanca/32/10464_2.png) [@selmanca](https://discourse.slicer.org/u/selmanca)\
**Post date:** [March 28, 2021, 9:07pm UTC](https://discourse.slicer.org/t/t2-mapping-error/16806/1 "2021-03-28T21:07:21Z")

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Operating system: Win 10  
Slicer version: 4.13.0

Hello developers,  
I am trying to use T2 mapping module for knee cartilage. After choosing input volume and T2 output volume, I click apply and it gives this error message in Python Interactor:  
module ‘string’ has no attribute ‘split’  
I think that it may be related with incompatibility of the T2 mapping code with Python version (3.6.7) of the latest Slicer version.  
Could you help me with this problem?  
Thanks

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [March 30, 2021, 1:24pm UTC](https://discourse.slicer.org/t/t2-mapping-error/16806/2 "2021-03-30T13:24:58Z")

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You are right, that extension probably hasn’t been updated to the lates python. That’s usually not hard to fix, so maybe you can file an issue and or propose a fix to the developer.

[https://github.com/QIICR/Slicer-PETDICOMExtension/pull/new/15-fix-ofstream](https://github.com/QIICR/Slicer-PETDICOMExtension/pull/new/15-fix-ofstream)

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<div class="post-metadata">

**Author:** ![selmanca](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/selmanca/32/10464_2.png) [@selmanca](https://discourse.slicer.org/u/selmanca)\
**Post date:** [March 30, 2021, 3:09pm UTC](https://discourse.slicer.org/t/t2-mapping-error/16806/3 "2021-03-30T15:09:04Z")

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thanks for the suggestion