# \#external-module

**URL:** https://discourse.itk.org/tag/external-module/60.md

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## [fatal: 'ITK/Modules/ThirdParty/GDCM/work/extract' is a missing but already registered worktree;](https://discourse.itk.org/t/fatal-itk-modules-thirdparty-gdcm-work-extract-is-a-missing-but-already-registered-worktree/2305)

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**Author:** [@mathieu.malaterre](https://discourse.itk.org/u/mathieu.malaterre)\
**Replies:** 3\
**Last updated:** [October 7, 2019, 2:30pm UTC](https://discourse.itk.org/t/fatal-itk-modules-thirdparty-gdcm-work-extract-is-a-missing-but-already-registered-worktree/2305 "2019-10-07T14:30:54Z")

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Hi there, I am trying to update GDCM module, and I have tried a naive: $ cd ~/ITK.git/Modules/ThirdParty/GDCM $ ./UpdateFromUpstream.sh But this fails with: Cloning into '/home/mmalaterre/workspace/ITK-upstream/Modul…

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## [error building an external module: cannot open input file 'ITKCommon.lib'](https://discourse.itk.org/t/error-building-an-external-module-cannot-open-input-file-itkcommon-lib/1346)

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**Author:** [@ebennink](https://discourse.itk.org/u/ebennink)\
**Replies:** 12\
**Last updated:** [October 15, 2018, 1:39pm UTC](https://discourse.itk.org/t/error-building-an-external-module-cannot-open-input-file-itkcommon-lib/1346 "2018-10-15T13:39:21Z")

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Dear all, I am trying to build an external ITK module, but linking the new module to the ITK libraries fails. It appears that CMake added the dependent ITK libraries as ITKCommon.lib and ITKSpatialObjects.lib to the lin…

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## [ITK External Module GitHub builds for 4.X and 5.X](https://discourse.itk.org/t/itk-external-module-github-builds-for-4-x-and-5-x/900)

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**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 4\
**Last updated:** [July 16, 2018, 6:09pm UTC](https://discourse.itk.org/t/itk-external-module-github-builds-for-4-x-and-5-x/900 "2018-07-16T18:09:45Z")

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As described in the ITKModuleTemplate README, it is possible to build and develop ITK modules on GitHub. The ITKModuleTemplate creates a configuration with continuous integration testing to build and test the module on L…

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## [\[SOLVED\] .lib file of external module is not build](https://discourse.itk.org/t/solved-lib-file-of-external-module-is-not-build/1039)

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**Author:** [@Gordian](https://discourse.itk.org/u/Gordian)\
**Replies:** 8\
**Last updated:** [June 29, 2018, 8:32am UTC](https://discourse.itk.org/t/solved-lib-file-of-external-module-is-not-build/1039 "2018-06-29T08:32:12Z")

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Hello, when I try to build (ENABLE\_SHARED) an external module the compiling is fine until the TestDriver and the HeaderTest are compiled. They are looking for an itkORA.lib file that is not created in the itk/lib/Debug …

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## [\[SOLVED\] Build RTK as external module for another module](https://discourse.itk.org/t/solved-build-rtk-as-external-module-for-another-module/986)

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**Author:** [@Gordian](https://discourse.itk.org/u/Gordian)\
**Replies:** 13\
**Last updated:** [June 9, 2018, 9:27pm UTC](https://discourse.itk.org/t/solved-build-rtk-as-external-module-for-another-module/986 "2018-06-09T21:27:26Z")

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Hi, After figuring out how to create a new module I wanted to create some tests for the module using the testdriver provided by the module template. I added an external module (RTK) and this works fine. An error occur…