# Build error with SimpleFastMutexLock
**URL:** https://discourse.itk.org/t/build-error-with-simplefastmutexlock/1393
**Category:** Engineering
**Created:** [November 2, 2018, 5:41pm UTC](https://discourse.itk.org/t/build-error-with-simplefastmutexlock/1393 "2018-11-02T17:41:58Z")
**Posts on this page:** 12
**Page:** 1
### Author:  [@melrobin](https://discourse.itk.org/u/melrobin)
#### Post date: [November 2, 2018, 5:41pm UTC](https://discourse.itk.org/t/build-error-with-simplefastmutexlock/1393/1 "2018-11-02T17:41:58Z")
In trying to build I get this error in generating one particular XML file:
[33%] Generating …/…/itkVnlForwardFFTImageFilter.xml
/home/melrobin/packages/ITK/build/Wrapping/itkFFTWGlobalConfiguration.cxx:38:18: error:
no type named ‘SimpleFastMutexLock’ in namespace ‘itk’
typedef itk::SimpleFastMutexLock itkSimpleFastMutexLock;
~~~~~ ^
1 error generated.
Any ideas on what to do?
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### Author:  [@dzenanz](https://discourse.itk.org/u/dzenanz)
#### Post date: [November 2, 2018, 6:45pm UTC](https://discourse.itk.org/t/build-error-with-simplefastmutexlock/1393/2 "2018-11-02T18:45:25Z")
There was a recent [patch](https://github.com/InsightSoftwareConsortium/ITK/commit/b56b8cc34e74a09e4fec35a72f5183406238168a) which deprecated `itk::SimpleFastMutexLock` and some other classes. I guess that this needs to be handled in Python wrappings too. I will look into it. Thanks for reporting!
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### Author:  [@dzenanz](https://discourse.itk.org/u/dzenanz)
#### Post date: [November 2, 2018, 6:54pm UTC](https://discourse.itk.org/t/build-error-with-simplefastmutexlock/1393/3 "2018-11-02T18:54:36Z")
It looks like there was a leftover wrapping for `SimpleFastMutexLock`. Let’s see if [this](http://review.source.kitware.com/#/c/23863/) fixes it. Can you also try this fix locally @melrobin?
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### Author:  [@melrobin](https://discourse.itk.org/u/melrobin)
#### Post date: [November 2, 2018, 7:01pm UTC](https://discourse.itk.org/t/build-error-with-simplefastmutexlock/1393/4 "2018-11-02T19:01:13Z")
It may have fixed this, but I’m not sure because some other stuff is broken:
/home/melrobin/packages/ITK/build/Wrapping/itkLabelSetMorphBaseImageFilter.cxx:26:78: error:
template argument for non-type template parameter must be an expression
…itk::Image\< signed short,2 \>, itk::Image\< signed short,2 \> \> itkLabelSet…
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/melrobin/packages/ITK/Modules/Remote/LabelErodeDilate/include/itkLabelSetMorphBaseImageFilter.h:45:38: note:
template parameter is declared here
template\< typename TInputImage, bool doDilate,
^
/home/melrobin/packages/ITK/build/Wrapping/itkLabelSetMorphBaseImageFilter.cxx:27:78: error:
template argument for non-type template parameter must be an expression
…itk::Image\< signed short,2 \>, itk::Image\< signed short,2 \> \>::Pointer it…
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/melrobin/packages/ITK/Modules/Remote/LabelErodeDilate/include/itkLabelSetMorphBaseImageFilter.h:45:38: note:
template parameter is declared here
template\< typename TInputImage, bool doDilate,
I’m not sure if this is the same problem though.
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### Author:  [@dzenanz](https://discourse.itk.org/u/dzenanz)
#### Post date: [November 2, 2018, 7:19pm UTC](https://discourse.itk.org/t/build-error-with-simplefastmutexlock/1393/5 "2018-11-02T19:19:05Z")
That is certainly not the same problem. That is related to [LabelErodeDilate](https://github.com/InsightSoftwareConsortium/LabelErodeDilate) remote module. Do you need that module? If not, you could just disable it (set `Module_LabelErodeDilate` to `OFF`) in CMake configure step.
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### Author:  [@melrobin](https://discourse.itk.org/u/melrobin)
#### Post date: [November 2, 2018, 7:22pm UTC](https://discourse.itk.org/t/build-error-with-simplefastmutexlock/1393/6 "2018-11-02T19:22:53Z")
OK, I disabled and am rebuilding.
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### Author:  [@melrobin](https://discourse.itk.org/u/melrobin)
#### Post date: [November 2, 2018, 9:28pm UTC](https://discourse.itk.org/t/build-error-with-simplefastmutexlock/1393/7 "2018-11-02T21:28:13Z")
Still building, but I would say that the fix worked.
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### Author:  [@jhlegarreta](https://discourse.itk.org/u/jhlegarreta)
#### Post date: [November 2, 2018, 9:41pm UTC](https://discourse.itk.org/t/build-error-with-simplefastmutexlock/1393/8 "2018-11-02T21:41:08Z")
The wrapping of the classes is [probably not accurate](https://github.com/InsightSoftwareConsortium/LabelErodeDilate/commit/d52c6dd2c9206b5b400d178f581243760e685c67).
I cannot open an issue on the repository, would it would be nice if anybody who has the rights did it.
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### Author:  [@melrobin](https://discourse.itk.org/u/melrobin)
#### Post date: [November 2, 2018, 9:42pm UTC](https://discourse.itk.org/t/build-error-with-simplefastmutexlock/1393/9 "2018-11-02T21:42:25Z")
The build completed and the fix did work. I do not believe that I as a regular user can open one up.
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### Author:  [@dzenanz](https://discourse.itk.org/u/dzenanz)
#### Post date: [November 5, 2018, 2:02pm UTC](https://discourse.itk.org/t/build-error-with-simplefastmutexlock/1393/10 "2018-11-05T14:02:57Z")
I enabled [issues](https://github.com/InsightSoftwareConsortium/LabelErodeDilate/issues) on that repository. I hesitated to do so earlier, because it is a fork of @richard.beare’s [repo](https://github.com/richardbeare/LabelErodeDilate).
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### Author:  [@phcerdan](https://discourse.itk.org/u/phcerdan)
#### Post date: [November 13, 2018, 8:29pm UTC](https://discourse.itk.org/t/build-error-with-simplefastmutexlock/1393/11 "2018-11-13T20:29:22Z")
I would recommend to delete the wrapping of the base class: `itkLabelSetMorphBaseImageFilter`. Opened issue: [https://github.com/InsightSoftwareConsortium/LabelErodeDilate/issues/12](https://github.com/InsightSoftwareConsortium/LabelErodeDilate/issues/12)
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### Author:  [@jhlegarreta](https://discourse.itk.org/u/jhlegarreta)
#### Post date: [November 18, 2018, 11:25pm UTC](https://discourse.itk.org/t/build-error-with-simplefastmutexlock/1393/12 "2018-11-18T23:25:10Z")
The wrapping issue has been fixed 🚀 🎆 🎉 in [https://github.com/InsightSoftwareConsortium/LabelErodeDilate](https://github.com/InsightSoftwareConsortium/LabelErodeDilate) master.
Thanks both @phcerdan and @matt.mccormick.