Error when running watershed

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1

I’m trying to use watershed segmentation (5.12.4 on Win10) and I get a segmentation fail message. This is what I get on detials:

Traceback (most recent call last):

File “C:\Users/JSG/AppData/Local/slicer.org/3D Slicer 5.12.4/bin/Python\slicer\util.py”, line 3614, in tryWithErrorDisplay

yield

File “C:\Users\JSG\AppData\Local\slicer.org\3D Slicer 5.12.4\lib\Slicer-5.12\qt-scripted-modules\SegmentEditorEffects\AbstractScriptedSegmentEditorAutoCompleteEffect.py”, line 303, in onPreview

self.preview()

File “C:\Users\JSG\AppData\Local\slicer.org\3D Slicer 5.12.4\lib\Slicer-5.12\qt-scripted-modules\SegmentEditorEffects\AbstractScriptedSegmentEditorAutoCompleteEffect.py”, line 567, in preview

self.computePreviewLabelmap(mergedImage, outputLabelmap)

File “C:/Users/JSG/AppData/Local/slicer.org/3D Slicer 5.12.4/slicer.org/Extensions-34645/SegmentEditorExtraEffects/lib/Slicer-5.12/qt-scripted-modules/SegmentEditorWatershedLib/SegmentEditorEffect.py”, line 111, in computePreviewLabelmap

labelImage = sitk.ReadImage(sitkUtils.GetSlicerITKReadWriteAddress(mergedLabelmapNode.GetName()))

             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File “C:\Users\JSG\AppData\Local\slicer.org\3D Slicer 5.12.4\lib\Python\Lib\site-packages\SimpleITK\extra.py”, line 384, in ReadImage

return reader.Execute()

       ^^^^^^^^^^^^^^^^

File “C:\Users\JSG\AppData\Local\slicer.org\3D Slicer 5.12.4\lib\Python\Lib\site-packages\SimpleITK\SimpleITK.py”, line 8534, in Execute

return \_SimpleITK.ImageFileReader_Execute(self)

       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

RuntimeError: Exception thrown in SimpleITK ImageFileReader_Execute: D:\a\SimpleITK\SimpleITK\Code\IO\src\sitkImageReaderBase.cxx:91:

sitk::ERROR: The file “slicer:0000023F71755F30#vtkMRMLLabelMapVolumeNode1” does not exist.

I created two segments and placed seeds in them. I am doing something wrong?