10:31:49: Running steps for project IDE...
10:31:49: Configuration unchanged, skipping qmake step.
10:31:49: Starting: "/usr/bin/make" -w
make: Entering directory `/home/X/Test_Projects/CentralWidget/IDE-build-desktop-Qt_4_8_3_in_PATH__System__Release'
g++ -c -pipe -O2 -Wall -W -D_REENTRANT -DQT_WEBKIT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I../IDE -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4 -I. -I. -I../IDE -I. -o main.o ../IDE/main.cpp
g++ -c -pipe -O2 -Wall -W -D_REENTRANT -DQT_WEBKIT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I../IDE -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4 -I. -I. -I../IDE -I. -o IDE.o ../IDE/IDE.cpp
../IDE/IDE.cpp: In member function 'void IDE::foobar()':
../IDE/IDE.cpp:25:5: error: reference to 'centralWidget' is ambiguous
In file included from ../IDE/IDE.h:6:0,
                 from ../IDE/IDE.cpp:1:
./ui_IDE.h:31:14: error: candidates are: QWidget* Ui_IDE::centralWidget
In file included from /usr/include/qt4/QtGui/QMainWindow:1:0,
                 from ../IDE/IDE.h:4,
                 from ../IDE/IDE.cpp:1:
/usr/include/qt4/QtGui/qmainwindow.h:140:14: error:                 QWidget* QMainWindow::centralWidget() const
../IDE/IDE.cpp:27:3: error: reference to 'centralWidget' is ambiguous
In file included from ../IDE/IDE.h:6:0,
                 from ../IDE/IDE.cpp:1:
./ui_IDE.h:31:14: error: candidates are: QWidget* Ui_IDE::centralWidget
In file included from /usr/include/qt4/QtGui/QMainWindow:1:0,
                 from ../IDE/IDE.h:4,
                 from ../IDE/IDE.cpp:1:
/usr/include/qt4/QtGui/qmainwindow.h:140:14: error:                 QWidget* QMainWindow::centralWidget() const
make: *** [IDE.o] Error 1
make: Leaving directory `/home/X/Test_Projects/CentralWidget/IDE-build-desktop-Qt_4_8_3_in_PATH__System__Release'
10:31:50: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project IDE (target: Desktop)
When executing step 'Make'