Unknown method return type for registered type

[killamanjarl]

I have the following main.cpp

@int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);

QtQuick2ApplicationViewer viewer;

qmlRegisterType<project::Model>("com.company.project", 1, 0, "Model");
qmlRegisterType<project::Run>("com.company.project", 1, 0, "Run");

viewer.setMainQmlFile&#40;QStringLiteral("qml/ProjectQml/main.qml"&#41;);
viewer.showExpanded();

return app.exec();

}@

And the following snippet in main.qml

@Project.Model {
id: projectModel
}

FileDialog {
    id: fileDialog
    title: "Please choose a file"
    selectFolder: true
    onAccepted: {
        console.log("You chose: " + fileDialog.fileUrl)
        var run = projectModel.startLoadingRun(fileDialog.fileUrl)
    }
    onRejected: {
        console.log("Canceled")
    }
}@

When I reach the "var run = exegesisModel.startLoadingRun(fileDialog.fileUrl)" line I get the error Error: Unknown method return type: Run*