Qt connect no such slot when slot definitely does exist

QObject::connect: No such signal QRTImpl::TaskHelper:: Or did you already switch from the old signal-slot-mechanism to the new one which is

If block is true, signals emitted by this object are blocked If block is false, no such

theater slot zeist QObject::connect: No such slot KActionSelector::itemDoubleClicked QObject::connect: No such slot KActionSelector

slot mama 관련 에러 메시지 : QObject::connect No such slot QLineEdit::slotUpdateClearButton 해당 클래스는 QLineEdit을 상속 받은