Deleting QSqlTableModel and QTableView

[waynew]

Ok, I'm stumped.
When I call openLog from the mainwindow menu, the existing model and view are deleted and replaced by the selected new ones. Works perfectly.
But, when I call openLog from a dialog via the mainwindow menu, to create and open a new database, it crashes when it tries to delete the current model and view.

void MainWindow::openLog(QString logName) {
    delete model; // existing
    delete view;  // existing
 
    QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
    db.setDatabaseName(logName + ".log.sqlite");
    db.open();
    model = new QSqlTableModel();
    view = new QTableView();
 
    model->setTable("log");
    //etc ...

void MainWindow::openLog(QString logName) {
    delete model; // existing
    delete view;  // existing

    QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
    db.setDatabaseName(logName + ".log.sqlite");
    db.open();
    model = new QSqlTableModel();
    view = new QTableView();

    model->setTable("log");
    //etc ...

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But... this crashes unless I comment out the delete model and delete view lines.

void NewLog::createLog() {
   QString log = m_ui->nlName->text();
 
   MainWindow mw;
   mw.openLog(log);
   NewLog::close();
}

void NewLog::createLog() {
   QString log = m_ui->nlName->text();
   
   MainWindow mw;
   mw.openLog(log);
   NewLog::close();
}

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