# SlicerIGT cannot use

**URL:** <https://discourse.slicer.org/t/slicerigt-cannot-use/22266>\
**Category:** Support\
**Tags:** build, extensions-manager, openigtlink\
**Created:** [March 2, 2022, 5:05pm UTC](https://discourse.slicer.org/t/slicerigt-cannot-use/22266 "2022-03-02T17:05:24Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![user5](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/user5/32/13217_2.png) [@user5](https://discourse.slicer.org/u/user5)\
**Post date:** [March 2, 2022, 5:05pm UTC](https://discourse.slicer.org/t/slicerigt-cannot-use/22266/1 "2022-03-02T17:05:24Z")

</div>

I have built a Slicer project with SlicerVR. I would like to use SlicerIGT in my project, so I directly install SlicerIGT and SlicerIGTLink in extensions-manager. Although I installed it successfully, it cannot open normally which is coming out those error,

 ![233](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/b/eb619581c151e1d6c0f1473f6619da95ae0ef1ba.png)  
Why those error is coming out suddenly? I do not any problem of installing SlicerIGT in normal release version.  
How can I fix it?

---

<div class="post-metadata">

**Author:** ![user5](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/user5/32/13217_2.png) [@user5](https://discourse.slicer.org/u/user5)\
**Post date:** [March 3, 2022, 1:10pm UTC](https://discourse.slicer.org/t/slicerigt-cannot-use/22266/2 "2022-03-03T13:10:45Z")

</div>

I have already followed this link to download Visual C++ runtime to fix the problem, but it does not work.

> [Slicer modules fail to load · Issue #4958 · Slicer/Slicer · GitHub](https://github.com/Slicer/Slicer/issues/4958)

It is the error in CMD.

```auto
Warning: QT_DEVICE_PIXEL_RATIO is deprecated. Instead use:
   QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen factors.
   QT_SCREEN_SCALE_FACTORS to set per-screen factors.
   QT_SCALE_FACTOR to set the application global scale factor.
Warning: QT_DEVICE_PIXEL_RATIO is deprecated. Instead use:
   QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen factors.
   QT_SCREEN_SCALE_FACTORS to set per-screen DPI.
   QT_SCALE_FACTOR to set the application global scale factor.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerBreachWarningModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerCollectPointsModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerCreateModelsModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerFiducialRegistrationWizardModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerPathExplorerModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerPivotCalibrationModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerTransformProcessorModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerUltrasoundSnapshotsModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerVolumeResliceDriverModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerWatchdogModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerOpenIGTLink\lib\Slicer-4.13\qt-loadable-modules\qSlicerOpenIGTLinkIFModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerOpenIGTLink\lib\Slicer-4.13\qt-loadable-modules\qSlicerOpenIGTLinkRemoteModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerOpenIGTLink\lib\Slicer-4.13\qt-loadable-modules\qSlicerPlusRemoteModule.dll: The specified module could not be found.
When loading module "BreachWarningSelfTest" , the dependency "CreateModels" failed to be loaded.
DLL load failed while importing vtkSlicerBreachWarningModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerCollectPointsModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerCreateModelsModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerFiducialRegistrationWizardModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerPathExplorerModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerPivotCalibrationModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerTransformProcessorModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerUltrasoundSnapshotsModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerVolumeResliceDriverModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerWatchdogModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerBreachWarningModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerCollectPointsModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerFiducialRegistrationWizardModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerPathExplorerModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerTransformProcessorModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerWatchdogModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerWatchdogModuleMRMLDisplayableManagerPython: The specified module could not be found.
DLL load failed while importing qSlicerFiducialRegistrationWizardModuleWidgetsPythonQt: The specified module could not be found.
DLL load failed while importing qSlicerPathExplorerModuleWidgetsPythonQt: The specified module could not be found.
DLL load failed while importing qSlicerPathExplorerSubjectHierarchyPluginsPythonQt: The specified module could not be found.
DLL load failed while importing qSlicerVolumeResliceDriverModuleWidgetsPythonQt: The specified module could not be found.
When loading module "UltrasoundRemoteControl" , the dependency "OpenIGTLinkRemote" failed to be loaded.

```

---

<div class="post-metadata">

**Author:** ![user5](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/user5/32/13217_2.png) [@user5](https://discourse.slicer.org/u/user5)\
**Post date:** [March 3, 2022, 7:25pm UTC](https://discourse.slicer.org/t/slicerigt-cannot-use/22266/3 "2022-03-03T19:25:18Z")

</div>

I have built a Slicer project with SlicerVR. I would like to use SlicerIGT in my project, so I directly install SlicerIGT and SlicerIGTLink in extensions-manager. Although I installed it successfully, it cannot open normally which is coming out those error,

```auto
Warning: QT_DEVICE_PIXEL_RATIO is deprecated. Instead use:
   QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen factors.
   QT_SCREEN_SCALE_FACTORS to set per-screen factors.
   QT_SCALE_FACTOR to set the application global scale factor.
Warning: QT_DEVICE_PIXEL_RATIO is deprecated. Instead use:
   QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen factors.
   QT_SCREEN_SCALE_FACTORS to set per-screen DPI.
   QT_SCALE_FACTOR to set the application global scale factor.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerBreachWarningModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerCollectPointsModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerCreateModelsModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerFiducialRegistrationWizardModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerPathExplorerModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerPivotCalibrationModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerTransformProcessorModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerUltrasoundSnapshotsModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerVolumeResliceDriverModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerWatchdogModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerOpenIGTLink\lib\Slicer-4.13\qt-loadable-modules\qSlicerOpenIGTLinkIFModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerOpenIGTLink\lib\Slicer-4.13\qt-loadable-modules\qSlicerOpenIGTLinkRemoteModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\D\S4R\Slicer_build_2\Slicer-build\NA-MIC\Extensions-30625\SlicerOpenIGTLink\lib\Slicer-4.13\qt-loadable-modules\qSlicerPlusRemoteModule.dll: The specified module could not be found.
When loading module "BreachWarningSelfTest" , the dependency "CreateModels" failed to be loaded.
DLL load failed while importing vtkSlicerBreachWarningModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerCollectPointsModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerCreateModelsModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerFiducialRegistrationWizardModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerPathExplorerModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerPivotCalibrationModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerTransformProcessorModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerUltrasoundSnapshotsModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerVolumeResliceDriverModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerWatchdogModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerBreachWarningModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerCollectPointsModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerFiducialRegistrationWizardModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerPathExplorerModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerTransformProcessorModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerWatchdogModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerWatchdogModuleMRMLDisplayableManagerPython: The specified module could not be found.
DLL load failed while importing qSlicerFiducialRegistrationWizardModuleWidgetsPythonQt: The specified module could not be found.
DLL load failed while importing qSlicerPathExplorerModuleWidgetsPythonQt: The specified module could not be found.
DLL load failed while importing qSlicerPathExplorerSubjectHierarchyPluginsPythonQt: The specified module could not be found.
DLL load failed while importing qSlicerVolumeResliceDriverModuleWidgetsPythonQt: The specified module could not be found.
When loading module "UltrasoundRemoteControl" , the dependency "OpenIGTLinkRemote" failed to be loaded.

```

I have already followed this link to download Visual C++ runtime to fix the problem, but it does not work.

> [Slicer modules fail to load · Issue #4958 · Slicer/Slicer · GitHub](https://github.com/Slicer/Slicer/issues/4958)

Why those error is coming out? How can I fix it?

---

<div class="post-metadata">

**Author:** ![user5](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/user5/32/13217_2.png) [@user5](https://discourse.slicer.org/u/user5)\
**Post date:** [March 4, 2022, 10:21am UTC](https://discourse.slicer.org/t/slicerigt-cannot-use/22266/4 "2022-03-04T10:21:40Z")

</div>

I afraid that the problem is occurred by too long extension path, so I put the file into C drive to make the path being shorter. Unfortunately, it seem like not useful.

```auto
Warning: QT_DEVICE_PIXEL_RATIO is deprecated. Instead use:
   QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen factors.
   QT_SCREEN_SCALE_FACTORS to set per-screen factors.
   QT_SCALE_FACTOR to set the application global scale factor.
Warning: QT_DEVICE_PIXEL_RATIO is deprecated. Instead use:
   QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen factors.
   QT_SCREEN_SCALE_FACTORS to set per-screen DPI.
   QT_SCALE_FACTOR to set the application global scale factor.
  Error(s):
    Cannot load library C:\NA-MIC\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerBreachWarningModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\NA-MIC\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerCollectPointsModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\NA-MIC\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerCreateModelsModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\NA-MIC\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerFiducialRegistrationWizardModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\NA-MIC\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerPathExplorerModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\NA-MIC\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerPivotCalibrationModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\NA-MIC\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerTransformProcessorModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\NA-MIC\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerUltrasoundSnapshotsModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\NA-MIC\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerVolumeResliceDriverModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\NA-MIC\SlicerIGT\lib\Slicer-4.13\qt-loadable-modules\qSlicerWatchdogModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\NA-MIC\SlicerOpenIGTLink\lib\Slicer-4.13\qt-loadable-modules\qSlicerOpenIGTLinkIFModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\NA-MIC\SlicerOpenIGTLink\lib\Slicer-4.13\qt-loadable-modules\qSlicerOpenIGTLinkRemoteModule.dll: The specified module could not be found.
  Error(s):
    Cannot load library C:\NA-MIC\SlicerOpenIGTLink\lib\Slicer-4.13\qt-loadable-modules\qSlicerPlusRemoteModule.dll: The specified module could not be found.
When loading module "BreachWarningSelfTest" , the dependency "CreateModels" failed to be loaded.
DLL load failed while importing vtkSlicerBreachWarningModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerCollectPointsModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerCreateModelsModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerFiducialRegistrationWizardModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerPathExplorerModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerPivotCalibrationModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerTransformProcessorModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerUltrasoundSnapshotsModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerVolumeResliceDriverModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerWatchdogModuleLogicPython: The specified module could not be found.
DLL load failed while importing vtkSlicerBreachWarningModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerCollectPointsModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerFiducialRegistrationWizardModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerPathExplorerModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerTransformProcessorModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerWatchdogModuleMRMLPython: The specified module could not be found.
DLL load failed while importing vtkSlicerWatchdogModuleMRMLDisplayableManagerPython: The specified module could not be found.
DLL load failed while importing qSlicerFiducialRegistrationWizardModuleWidgetsPythonQt: The specified module could not be found.
DLL load failed while importing qSlicerPathExplorerModuleWidgetsPythonQt: The specified module could not be found.
DLL load failed while importing qSlicerPathExplorerSubjectHierarchyPluginsPythonQt: The specified module could not be found.
DLL load failed while importing qSlicerVolumeResliceDriverModuleWidgetsPythonQt: The specified module could not be found.

```

I would like to ask that do everybody have any idea to fix it?

Thank you

---

<div class="post-metadata">

**Author:** ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Post date:** [March 4, 2022, 10:32am UTC](https://discourse.slicer.org/t/slicerigt-cannot-use/22266/5 "2022-03-04T10:32:14Z")

</div>

If you build Slicer, you will need to build all the extensions you want to use.

---

<div class="post-metadata">

**Author:** ![user5](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/user5/32/13217_2.png) [@user5](https://discourse.slicer.org/u/user5)\
**Post date:** [March 4, 2022, 11:47am UTC](https://discourse.slicer.org/t/slicerigt-cannot-use/22266/6 "2022-03-04T11:47:54Z")

</div>

Thank you for your reply.  
So I need to add a new entry for each extension source file in CMake of Slicer master build. Am I right?

---

<div class="post-metadata">

**Author:** ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Post date:** [March 4, 2022, 2:21pm UTC](https://discourse.slicer.org/t/slicerigt-cannot-use/22266/7 "2022-03-04T14:21:41Z")

</div>

> [@user5](#):
>
> I have built a Slicer project with SlicerVR

You said you built SlicerVR for your Slicer. You need to do the same for all the other extensions too.