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[Solved] Old/deleted reference moc_mainwindow.o causing 'Undefined symbols for architecture x86_64' error

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Update/Solved: In my post I mention the files are exactly the same; however, I was playing around w/ my version control during the time and it’s possible that it reverted to the older file. Original post: Forgive me if my terminology is wrong, I’m brand new to Qt. I’m getting the following error on compile: Error: symbol(s) not found for architecture x86_64. I know what is causing the error and have fixed it; however, I don’t know what happend or why. Compiler Output ld: warning: directory not found for option '-F/Applications/Qt/5.0.2/clang_64/qtbase/lib' Undefined symbols for architecture x86_64:  * "MainWindow::on_actionExit_triggered()", referenced from:       MainWindow::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) in moc_mainwindow.o* ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) make: *** [HSI_Signature_Library.app/Contents/MacOS/HSI_Signature_Library] Error 1 22:21:11: The process "/usr/bin/make" exited with code 2. Error while building/deploying project HSI_Signature_Library (kit: Desktop Qt 5.0.2 clang 64bit) When executing step 'Make' Line 3: * “MainWindow::on_actionExit_triggered()”, referenced from: on_actionExit_triggered() was an “exit” button that I put onto the form, then deleted it. It is no where in my project, yet is creating this error. I’ve searched everywhere in my project for it, and I’m sure I deleted it. I confirmed this is the problem by creating a new project, importing the _exact _same files and it compiled with no problem. Can someone explain what happened in this project? Is on_actionExit_triggered() cashed somewhere or something? Or am I missing/not understanding something else?

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