Help!....

**k12yp70n** · 10th August 2009, 16:20

Hi there folks, I've encountered a big problem here....

Let's just say that I have just upgraded to the latest version of Qt and now I am unable to build any of my software projects that use signals/slots. When I try to build I get this message:

Undefined symbols:
"main_window::save()", referenced from:
main_window::qt_metacall(QMetaObject::Call, int, void**)in moc_main_window.o
ld: symbol(s) not found
collect2: ld returned 1 exit status

And yes I'm using the Q_OBJECT macro, so I think I should be running into any sort of problem...

Thanks in Advance.

**Lykurg** · 10th August 2009, 19:21

Have you cleaned your project before building with the new version of Qt?

**k12yp70n** · 10th August 2009, 19:28

I have but it still doesn't work...

**PaceyIV** · 10th August 2009, 20:20

try to run qmake and then compile

**k12yp70n** · 12th August 2009, 15:19

Tried that as well and it didn't work...

**PaceyIV** · 12th August 2009, 15:24

What are you using to develop and compile your project? QtCreator?
Have you check that in Tool\Options\Qt4 is selected the right and valid Qt Version Path?

**wysota** · 12th August 2009, 15:41

Does the implementation of main_window::save() really exist?

**k12yp70n** · 12th August 2009, 16:34

Yes I have checked the version of Qt that I am using through Qt Creator (4.5.2)

And yes save() has been implemented

**wysota** · 12th August 2009, 17:12

Are you sure it's included into the project and gets compiled during the build process? Can you show us where save() is implemented and what it contains?