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Код

int DoInImpl::RarusRequest()
{    
        QSqlDatabase dbNewRarus = QSqlDatabase::addDatabase("QODBC");

        QString qstrConnectionString = "Driver={SQL Native Client};Server=";
        qstrConnectionString.append(structSettings.RarusServ);
        qstrConnectionString.append(";Database=");
        qstrConnectionString.append(structSettings.RarusDataBase);
        qstrConnectionString.append(";Uid=");
        qstrConnectionString.append(structSettings.RarusDataBaseUser);
        qstrConnectionString.append(";Pwd=");
        qstrConnectionString.append(structSettings.RarusDataBasePassword);

        dbNewRarus.setDatabaseName(qstrConnectionString);
        
    bool connected = dbNewRarus.open();
    if (!connected) 
        {
         QMessageBox msgBox;

            msgBox.setText("database : new_rarus");
            msgBox.setIcon(QMessageBox::Critical);
            msgBox.setDefaultButton(QMessageBox::Save);
            msgBox.setInformativeText(dbNewRarus.lastError().text());
            msgBox.setStandardButtons(QMessageBox::Ok);
            msgBox.setDefaultButton(QMessageBox::Ok);
            msgBox.exec();
            
            return 10;
        }
    
    model = new QSqlQueryModel(tableView);
    QString qstrToAppend;
    qstrToAppend.append("SELECT "
   ...

    model->setQuery(QSqlQuery(qstrToAppend));   


    tableView->setModel(model); <== точка здесь

    return 0;
}