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qqmlapplicationengine refuse to show me something

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Hi all, Just checked out qt51rc1. I tried to use qqmlapplicationengine to show a qml file. It seems the application runs silently without showing anything. I did it very simple: in c++ int main(int argc, char *argv[]) { QGuiApplication app(argc, argv); // QtQuick2ApplicationViewer viewer; // viewer.setMainQmlFile(QStringLiteral(“qml/QMLApplication/main2.qml”)); // viewer.showExpanded(); QQmlApplicationEngine engine(“qml/QMLApplication/main2.qml”); return app.exec(); } I qml: import QtQuick 2.1 import QtQuick.Controls 1.0 import QtQuick.Window 2.0 Rectangle { width: 640 height: 480 Button { text: qsTr(“Hello World”) anchors.horizontalCenter: parent.horizontalCenter anchors.verticalCenter: parent.verticalCenter } } If I use the commented out viewer it works. But Id like to use an ApplicationWindow instead of a Rectangle as root item. Am I missing something or is this just a bug in qt5.1? Cheers and thx to everyone

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