g++ -c -m64 -pipe -O2 -w -D_REENTRANT -DQT_NO_DEBUG -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++-64 -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtNetwork -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtOpenGL -I/usr/include/qt4 -I/usr/include/QtMultimediaKit -I. -I/usr/src/3rdparty/zlib -I/usr/include/QtMobility -I/usr/include -I/usr/include/QtMobility -I/usr/X11R6/include -I.moc -I.ui -o .obj/feecalculator.o feecalculator.cpp
feecalculator.cpp: In constructor ‘FeeCalculator::FeeCalculator()’:
feecalculator.cpp:42:5: error: ‘class Ui::FeeCalculator’ has no member named ‘singleInstance’
  ui.singleInstance->setChecked(mainWindow.feeCalculatorSingleInstance);
     ^
make: *** [.obj/feecalculator.o] Fehler 1