The following custom view names are reserved and already used in ASPiK - you can find these in the plugingui.cpp files and change them if you like but the best option is to simply avoid using them.

TrackPad_
CustomKickButton
CustomKickButtonDU
CustomKickButtonU
CustomKickButtonD
CustomTextButton
CustomTextButtonDU
CustomTextButtonU
CustomTextButtonD
KnobSwitchView
UniversalAPIKnob
SliderSwitchView
UniversalAPISlider
AnalogMeterView
InvertedAnalogMeterView
MeterView
InvertedMeterView