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I am having a class A, parent of class B and class C. I have signals: declared and used in class B and class C. But when i try to write other signals: in class A, its giving me vtable reference errors. I am not able to write the Q_OBJECT macro in .h file, which result in error.

sujithkrishnan
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1 Answers1

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Since you have not provided any code I will just make a wild guess.

Undefined reference to `vtable kind of errors usually stem from moc compiler not generating code.

I am just guessing that you need to re-run qmake.

Also make sure that this file is included to HEADERS section of your .pro file.

O.C.
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  • This is correct, every time you add the Q_OBJECT macro to a class you need to re-run qmake. – Chris Aug 01 '11 at 20:53
  • Problem is that when i write signal method, i am getting error that the method is not defined. compiler is not treating it as a signal, but as an instance method. – sujithkrishnan Aug 02 '11 at 06:33