Occasional Lua error when switching to the button editor

[brittyazel]

Lua error popping up when switching into the button editor. I can't find the pattern yet, but it's showing up when I'm switching between the button editor for action buttons and the button editor for status buttons. Going back and forth between the two and the bar edit tab will eventually result in the following error:

14x Neuron/GUI/ButtonEditTab.lua:203: attempt to index upvalue 'specData' (a nil value)
[string "@Neuron/GUI/ButtonEditTab.lua"]:203: in function <Neuron/GUI/ButtonEditTab.lua:195>
[string "=[C]"]: ?
[string "@EnhancedRaidFrames/Libs/AceGUI-3.0-41/AceGUI-3.0.lua"]:66: in function <...ns/EnhancedRaidFrames/Libs/AceGUI-3.0/AceGUI-3.0.lua:64>
[string "@EnhancedRaidFrames/Libs/AceGUI-3.0-41/AceGUI-3.0.lua"]:300: in function `Fire'
[string "@EnhancedRaidFrames/Libs/AceGUI-3.0-41/widgets/AceGUIContainer-TreeGroup.lua"]:522: in function `Select'
[string "@EnhancedRaidFrames/Libs/AceGUI-3.0-41/widgets/AceGUIContainer-TreeGroup.lua"]:530: in function `SelectByValue'
[string "@Neuron/GUI/ButtonEditTab.lua"]:223: in function `ButtonsEditPanel'
[string "@Neuron/GUI/MainWindow.lua"]:106: in function `SelectTab'
[string "@Neuron/GUI/MainWindow.lua"]:93: in function <Neuron/GUI/MainWindow.lua:93>
[string "=[C]"]: ?
[string "@EnhancedRaidFrames/Libs/AceGUI-3.0-41/AceGUI-3.0.lua"]:66: in function <...ns/EnhancedRaidFrames/Libs/AceGUI-3.0/AceGUI-3.0.lua:64>
[string "@EnhancedRaidFrames/Libs/AceGUI-3.0-41/AceGUI-3.0.lua"]:300: in function `Fire'
[string "@EnhancedRaidFrames/Libs/AceGUI-3.0-41/widgets/AceGUIContainer-TabGroup.lua"]:342: in function `SelectTab'
[string "@EnhancedRaidFrames/Libs/AceGUI-3.0-41/widgets/AceGUIContainer-TabGroup.lua"]:200: in function <...Libs/AceGUI-3.0/widgets/AceGUIContainer-TabGroup.lua:197>