Kernschmelze not effective in G3

[Morula-Type]

I'm having troubles making kernschmelze working in G3,. When run, it simply closes and when I go to the kerning panel there is no visible effect of it having worked. Any solution to this?

[weiweihuanghuang]

I get this error in G3:

~/Library/Application Support/Glyphs 3/Scripts/vanilla/vanillaWindows.py:280: VanillaWarning: The windows `minSize` is bigger then the initial size.
  warn("The windows `minSize` is bigger then the initial size.", VanillaWarning)
Traceback (most recent call last):
  File "Kernschmelze.py", line 442, in buttonCallback
    UI_SelectedMasterA_Value = self.UI_sourceMasterA[0].weightValue
                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NSKVONotifying_GSFontMaster' object has no attribute 'weightValue'

[schriftgestalt]

Can you try again. I changed it so that it doesn’t throw an error, but didn’t check if it does the right thing, still.