QT C++ error: undefined reference to `vtable for appprinter'

Question

question: i have a program that includes a printer class \'apppprinter\', but when trying to compile i get the error:

appprinter.cpp:(.text+0x105): undefined re         


        

Answer 1

Whenever you face this type of situation always do a clean, qmake and rebuild. It fixes unless you have other problems like missing Q_OBJECT or unimplemented pure virtuals.