Error if fixed and moving volumes are not set

[lassoan]

The following error occurs if trying to register segments without selecting fixed and moving image:

[DEBUG][Qt] 11.09.2019 09:01:54 [] (unknown:0) - Session start time .......: 2019-09-11 09:01:54
[DEBUG][Qt] 11.09.2019 09:01:54 [] (unknown:0) - Slicer version ...........: 4.10.2 (revision 28257) win-amd64 - installed release
[DEBUG][Qt] 11.09.2019 09:01:54 [] (unknown:0) - Operating system .........: Windows /  Professional /  (Build 9200) - 64-bit
[DEBUG][Qt] 11.09.2019 09:01:54 [] (unknown:0) - Memory ...................: 32590 MB physical, 37454 MB virtual
[DEBUG][Qt] 11.09.2019 09:01:54 [] (unknown:0) - CPU ......................: GenuineIntel , 12 cores, 12 logical processors
[DEBUG][Qt] 11.09.2019 09:01:54 [] (unknown:0) - VTK configuration ........: OpenGL2 rendering, TBB threading
[DEBUG][Qt] 11.09.2019 09:01:54 [] (unknown:0) - Developer mode enabled ...: yes
[DEBUG][Qt] 11.09.2019 09:01:54 [] (unknown:0) - Prefer executable CLI ....: yes
[DEBUG][Qt] 11.09.2019 09:01:54 [] (unknown:0) - Additional module paths ..:
...
[DEBUG][Qt] 11.09.2019 09:02:27 [] (unknown:0) - Switch to module:  "SegmentRegistration"
[DEBUG][Qt] 11.09.2019 09:02:35 [] (unknown:0) - Switch to module:  "Data"
[DEBUG][Qt] 11.09.2019 09:02:39 [] (unknown:0) - Switch to module:  "SegmentRegistration"
[INFO][Python] 11.09.2019 09:02:49 [Python] (C:/Users/andra/AppData/Roaming/NA-MIC/Extensions-28257/SegmentRegistration/lib/Slicer-4.10/qt-scripted-modules/SegmentRegistration.py:367) - Performing registration workflow
[INFO][Python] 11.09.2019 09:02:49 [Python] (C:/Users/andra/AppData/Roaming/NA-MIC/Extensions-28257/SegmentRegistration/lib/Slicer-4.10/qt-scripted-modules/SegmentRegistration.py:376) - Cropping moving volume
[ERROR][Python] 11.09.2019 09:02:49 [Python] (C:/Users/andra/AppData/Roaming/NA-MIC/Extensions-28257/SegmentRegistration/lib/Slicer-4.10/qt-scripted-modules/SegmentRegistration.py:378) - Unable to access MR volume or segmentation
[INFO][Python] 11.09.2019 09:02:49 [Python] (C:/Users/andra/AppData/Roaming/NA-MIC/Extensions-28257/SegmentRegistration/lib/Slicer-4.10/qt-scripted-modules/SegmentRegistration.py:433) - Pre-aligning segmentations
[ERROR][Python] 11.09.2019 09:02:49 [Python] (C:/Users/andra/AppData/Roaming/NA-MIC/Extensions-28257/SegmentRegistration/lib/Slicer-4.10/qt-scripted-modules/SegmentRegistration.py:435) - Invalid data selection
[INFO][Python] 11.09.2019 09:02:49 [Python] (C:/Users/andra/AppData/Roaming/NA-MIC/Extensions-28257/SegmentRegistration/lib/Slicer-4.10/qt-scripted-modules/SegmentRegistration.py:494) - Resampling fixed volume
[ERROR][Python] 11.09.2019 09:02:49 [Python] (C:/Users/andra/AppData/Roaming/NA-MIC/Extensions-28257/SegmentRegistration/lib/Slicer-4.10/qt-scripted-modules/SegmentRegistration.py:496) - Unable to access fixed volume
[INFO][Python] 11.09.2019 09:02:49 [Python] (C:/Users/andra/AppData/Roaming/NA-MIC/Extensions-28257/SegmentRegistration/lib/Slicer-4.10/qt-scripted-modules/SegmentRegistration.py:528) - Creating contour labelmaps
[INFO][Stream] 11.09.2019 09:02:49 [] (unknown:0) - Performing registration workflow
[INFO][Stream] 11.09.2019 09:02:49 [] (unknown:0) - Cropping moving volume
[CRITICAL][Stream] 11.09.2019 09:02:49 [] (unknown:0) - Unable to access MR volume or segmentation
[INFO][Stream] 11.09.2019 09:02:49 [] (unknown:0) - Pre-aligning segmentations
[CRITICAL][Stream] 11.09.2019 09:02:49 [] (unknown:0) - Invalid data selection
[INFO][Stream] 11.09.2019 09:02:49 [] (unknown:0) - Resampling fixed volume
[CRITICAL][Stream] 11.09.2019 09:02:49 [] (unknown:0) - Unable to access fixed volume
[INFO][Stream] 11.09.2019 09:02:49 [] (unknown:0) - Creating contour labelmaps
[WARNING][VTK] 11.09.2019 09:02:49 [] (unknown:0) - Generic Warning: In D:\D\S\Slicer-4102\Modules\Loadable\Segmentations\Logic\vtkSlicerSegmentationsModuleLogic.cxx, line 389
vtkSlicerSegmentationsModuleLogic::CreateOrientedImageDataFromVolumeNode: Invalid volume node
[CRITICAL][Stream] 11.09.2019 09:02:49 [] (unknown:0) - Traceback (most recent call last):
[CRITICAL][Stream] 11.09.2019 09:02:49 [] (unknown:0) -   File "C:/Users/andra/AppData/Roaming/NA-MIC/Extensions-28257/SegmentRegistration/lib/Slicer-4.10/qt-scripted-modules/SegmentRegistration.py", line 256, in onPerformRegistration
[CRITICAL][Stream] 11.09.2019 09:02:49 [] (unknown:0) -     if self.logic.performRegistration():
[CRITICAL][Stream] 11.09.2019 09:02:49 [] (unknown:0) -   File "C:/Users/andra/AppData/Roaming/NA-MIC/Extensions-28257/SegmentRegistration/lib/Slicer-4.10/qt-scripted-modules/SegmentRegistration.py", line 371, in performRegistration
[CRITICAL][Stream] 11.09.2019 09:02:49 [] (unknown:0) -     self.createContourLabelmaps()
[CRITICAL][Stream] 11.09.2019 09:02:49 [] (unknown:0) -   File "C:/Users/andra/AppData/Roaming/NA-MIC/Extensions-28257/SegmentRegistration/lib/Slicer-4.10/qt-scripted-modules/SegmentRegistration.py", line 560, in createContourLabelmaps
[CRITICAL][Stream] 11.09.2019 09:02:49 [] (unknown:0) -     movingAnatomyOrientedImageData.UnRegister(None)
[CRITICAL][Stream] 11.09.2019 09:02:49 [] (unknown:0) - AttributeError: 'NoneType' object has no attribute 'UnRegister'

No registration is computed.