Are you using QtQuick Controls 1 or QtQuick Controls 2? If QtQuick Control 2, do the following: stackView.push("qrc:/Profile.qml", {user_info: user_data}) For Controls 1: stackView.push({item: "qrc:/Profile.qml", properties: {user_info: user_data}}) I think you may be using Controls 2, and the original command you used was for Controls 1. Your solution worked because it is a correct way to use the push function for Controls 2 (although having it as a list isn't necessary since you're only pushing one item) See the difference between the push function for Controls 1 and Controls 2 in the documentation: (Controls 1) (Controls 2)