# Fail to load OpenIGTLinkIF
**URL:** https://discourse.slicer.org/t/fail-to-load-openigtlinkif/12185
**Category:** Development
**Created:** [June 23, 2020, 8:22pm UTC](https://discourse.slicer.org/t/fail-to-load-openigtlinkif/12185 "2020-06-23T20:22:55Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@kobidk](https://discourse.slicer.org/u/kobidk)
#### Post date: [June 23, 2020, 8:22pm UTC](https://discourse.slicer.org/t/fail-to-load-openigtlinkif/12185/1 "2020-06-23T20:22:55Z")
Operating system:Windows
Slicer version:4.10.2
Expected behavior: Load OpenIGTLinkIF
Actual behavior: Doesn’t appear in the Slicer menu “modules” list, after loading it as a package using Extention Manager.
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### Author:  [@Sunderlandkyl](https://discourse.slicer.org/u/Sunderlandkyl)
#### Post date: [June 23, 2020, 8:53pm UTC](https://discourse.slicer.org/t/fail-to-load-openigtlinkif/12185/2 "2020-06-23T20:53:57Z")
Can you check if there is an error in the application log?
[https://www.slicer.org/wiki/Documentation/Nightly/SlicerApplication/ErrorLog#To\_capture\_the\_entire\_error\_log\_for\_a\_report](https://www.slicer.org/wiki/Documentation/Nightly/SlicerApplication/ErrorLog#To_capture_the_entire_error_log_for_a_report)
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### Author:  [@kobidk](https://discourse.slicer.org/u/kobidk)
#### Post date: [June 24, 2020, 8:05am UTC](https://discourse.slicer.org/t/fail-to-load-openigtlinkif/12185/3 "2020-06-24T08:05:22Z")
Kyle,
Thanks for your quick response.
1. The following is the error log. I couldn’t understand the reason for the mismatch with the Qt library and also the other error about “vtkvmtk”
2. To build the DLLs library I run the following batch file. I hope this will clarify what I did, maybe wrong.
I hope you can clarify these for me.
BR
Kobi
The Batch file :
mkdir N:\dev\3DSlicer\SlicerOpenIGTLink-master\OpenIGTLinkIF\Build
cd /d N:\dev\3DSlicer\SlicerOpenIGTLink-master\OpenIGTLinkIF\Build
“C:\Program Files\CMake\bin\cmake.exe” -G “Visual Studio 15 2017 Win64” -DQt5\_DIR:PATH=N:\dev\Qt1\5.9.9\msvc2015\_64\lib\cmake\Qt5 -DSlicer\_DIR:PATH=N:\dev\DS41\DS41D\Slicer-build -DOpenIGTLinkIO\_DIR:Path=N:\dev\3DSlicer\SlicerOpenIGTLink-master\Build\OpenIGTLinkIO-build N:\dev\3DSlicer\SlicerOpenIGTLink-master\OpenIGTLinkIF
“C:\Program Files\CMake\bin\cmake.exe” --build . --config Debug
The Error Log :
[DEBUG][Qt] 23.06.2020 23:19:23 [] (unknown:0) - Session start time …: 2020-06-23 23:19:23
[DEBUG][Qt] 23.06.2020 23:19:23 [] (unknown:0) - Slicer version …: 4.10.2 (revision 28257) win-amd64 - installed release
[DEBUG][Qt] 23.06.2020 23:19:23 [] (unknown:0) - Operating system …: Windows / Personal / (Build 9200) - 64-bit
[DEBUG][Qt] 23.06.2020 23:19:23 [] (unknown:0) - Memory …: 16258 MB physical, 39905 MB virtual
[DEBUG][Qt] 23.06.2020 23:19:23 [] (unknown:0) - CPU …: GenuineIntel , 8 cores, 8 logical processors
[DEBUG][Qt] 23.06.2020 23:19:23 [] (unknown:0) - VTK configuration …: OpenGL2 rendering, TBB threading
[DEBUG][Qt] 23.06.2020 23:19:23 [] (unknown:0) - Developer mode enabled …: yes
[DEBUG][Qt] 23.06.2020 23:19:23 [] (unknown:0) - Prefer executable CLI …: no
[DEBUG][Qt] 23.06.2020 23:19:23 [] (unknown:0) - Additional module paths …: C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28257/SlicerIGT/lib/Slicer-4.10/qt-loadable-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28257/SlicerIGT/lib/Slicer-4.10/qt-scripted-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28257/SlicerVirtualReality/lib/Slicer-4.10/qt-loadable-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28257/SlicerIGSIO/lib/Slicer-4.10/qt-loadable-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28257/SlicerJupyter/lib/Slicer-4.10/qt-loadable-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28257/SlicerVMTK/lib/Slicer-4.10/qt-loadable-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28257/SlicerVMTK/lib/Slicer-4.10/qt-scripted-modules, N:/dev/DS41/DS41D/Slicer-build/Extensions/KobiTracker\KobiTracker\KobiTracker, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28866/SlicerIGT/lib/Slicer-4.10/qt-loadable-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28866/SlicerIGT/lib/Slicer-4.10/qt-scripted-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28866/EasyClip/lib/Slicer-4.10/qt-scripted-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28866/AnglePlanesExtension/lib/Slicer-4.10/qt-scripted-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28866/SlicerOpenCV/lib/Slicer-4.10/qt-loadable-modules, N:/dev/3DSlicer/Tutorial/ProgramingTutorial/HelloPython\_Nightly/code/HelloPython, N:/dev/3DSlicer/Tutorial/ProgramingTutorial/HelloPython\_Nightly/code/HelloLaplace, N:/dev/3DSlicer/Tutorial/ProgramingTutorial/HelloPython\_Nightly/code/HelloSharpen, N:/dev/3DSlicer/Tutorial/SlicerSimpleWorkflow, N:/dev/3DSlicer/Tutorial/ExampleGuideletExtension-master/ExampleGuidelet, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28257/SlicerRT/lib/Slicer-4.10/cli-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28257/SlicerRT/lib/Slicer-4.10/qt-loadable-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28257/SlicerRT/lib/Slicer-4.10/qt-scripted-modules, N:/dev/3DSlicer/OpenIGTLinkIF/OpenIGTLinkIF-master/Build, N:/dev/3DSlicer/SlicerOpenIGTLink-master/Build/inner-build/lib/Slicer-4.11/qt-loadable-modules/Debug, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28257/AnglePlanesExtension/lib/Slicer-4.10/qt-scripted-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28257/Sequences/lib/Slicer-4.10/qt-loadable-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28257/Sequences/lib/Slicer-4.10/qt-scripted-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28257/SlicerOpenCV/lib/Slicer-4.10/qt-loadable-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28866/DCMQI/lib/Slicer-4.10/cli-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28866/NeedleFinder/lib/Slicer-4.10/qt-scripted-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28866/DeepInfer/lib/Slicer-4.10/qt-scripted-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28866/ErodeDilateLabel/lib/Slicer-4.10/cli-modules, C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28866/IntensitySegmenter/lib/Slicer-4.10/cli-modules
[CRITICAL][Qt] 23.06.2020 23:19:26 [] (unknown:0) - Error(s):
The plugin ‘N:/dev/3DSlicer/SlicerOpenIGTLink-master/Build/inner-build/lib/Slicer-4.11/qt-loadable-modules/Debug/qSlicerOpenIGTLinkIFModule.dll’ uses incompatible Qt library. (Cannot mix debug and release libraries.)
[CRITICAL][Qt] 23.06.2020 23:19:26 [] (unknown:0) - Error(s):
The plugin ‘N:/dev/3DSlicer/SlicerOpenIGTLink-master/Build/inner-build/lib/Slicer-4.11/qt-loadable-modules/Debug/qSlicerOpenIGTLinkRemoteModule.dll’ uses incompatible Qt library. (Cannot mix debug and release libraries.)
[CRITICAL][Qt] 23.06.2020 23:19:26 [] (unknown:0) - Error(s):
The plugin ‘N:/dev/3DSlicer/SlicerOpenIGTLink-master/Build/inner-build/lib/Slicer-4.11/qt-loadable-modules/Debug/qSlicerPlusRemoteModule.dll’ uses incompatible Qt library. (Cannot mix debug and release libraries.)
[INFO][Stream] 23.06.2020 23:19:28 [] (unknown:0) - . **init** -----------------------
[INFO][Stream] 23.06.2020 23:19:28 [] (unknown:0) - . **init** -----------------------
[INFO][Stream] 23.06.2020 23:19:28 [] (unknown:0) - .setLabels -----------------------
[INFO][Stream] 23.06.2020 23:19:28 [] (unknown:0) - .setColors -----------------------
[INFO][Stream] 23.06.2020 23:19:28 [] (unknown:0) - .setColors255 -----------------------
[INFO][Stream] 23.06.2020 23:19:28 [] (unknown:0) - .setColors255 -----------------------
[INFO][Stream] 23.06.2020 23:19:28 [] (unknown:0) - .setHolesCoordinates -----------------------
[CRITICAL][Qt] 23.06.2020 23:19:28 [] (unknown:0) - Error(s):
CLI executable: C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28257/SlicerVMTK/lib/Slicer-4.10/qt-loadable-modules/vtkvmtk.py
The process failed to start. Either the invoked program is missing, or you may have insufficient permissions to invoke the program.
[CRITICAL][Qt] 23.06.2020 23:19:28 [] (unknown:0) - Fail to instantiate module “vtkvmtk”
[DEBUG][Python] 23.06.2020 23:19:29 [Python] (N:\Program Files\Slicer 4.10.2\lib\Slicer-4.10\qt-scripted-modules\SubjectHierarchyPlugins\AbstractScriptedSubjectHierarchyPlugin.py:36) - Scripted subject hierarchy plugin registered: Annotations
[DEBUG][Python] 23.06.2020 23:19:31 [Python] (N:\Program Files\Slicer 4.10.2\lib\Slicer-4.10\qt-scripted-modules\SubjectHierarchyPlugins\AbstractScriptedSubjectHierarchyPlugin.py:36) - Scripted subject hierarchy plugin registered: SegmentEditor
[DEBUG][Python] 23.06.2020 23:19:31 [Python] (N:\Program Files\Slicer 4.10.2\lib\Slicer-4.10\qt-scripted-modules\SubjectHierarchyPlugins\AbstractScriptedSubjectHierarchyPlugin.py:36) - Scripted subject hierarchy plugin registered: SegmentStatistics
[DEBUG][Qt] 23.06.2020 23:19:32 [] (unknown:0) - Switch to module: “Welcome”
[INFO][VTK] 23.06.2020 23:19:33 [vtkMRMLVolumeArchetypeStorageNode (0000022AE618A890)] (D:\D\S\Slicer-4102\Libs\MRML\Core\vtkMRMLVolumeArchetypeStorageNode.cxx:465) - Loaded volume from file: C:/Users/kobid/AppData/Roaming/NA-MIC/Extensions-28257/SlicerVMTK/lib/Slicer-4.10/qt-scripted-modules/Resources/Vesselness.png. Dimensions: 65x50x1. Number of components: 3. Pixel type: unsigned char.
[INFO][Stream] 23.06.2020 23:19:33 [] (unknown:0) - Loading Slicer RC file [C:/Users/kobid/AppData/Roaming/SPB\_16.6/.slicerrc.py]
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### Author:  [@Sunderlandkyl](https://discourse.slicer.org/u/Sunderlandkyl)
#### Post date: [June 24, 2020, 2:25pm UTC](https://discourse.slicer.org/t/fail-to-load-openigtlinkif/12185/4 "2020-06-24T14:25:36Z")
Can you clarify if you are using a downloaded version of Slicer 4.10.2, or one that you downloaded yourself?
If you are using a downloaded version of Slicer, you should download the SlicerOpenIGTLink extension from the extension manager.
If you are using a version of Slicer that you compiled, you should make sure that you use the same configuration for both. Your Slicer appears to be Release, while SlicerOpenIGTLink is Debug.