can't perform select sqlite

I created database with SQlite manager and checked it, it works. So here is the code:

QSqlDatabase dbase = QSqlDatabase::addDatabase("QSQLITE");
dbase.setDatabaseName("Travel.sqlite");
if (!dbase.open()) {
    qDebug() << "Problem with connect 1!";
}

QSqlQuery query;
if (!query.exec("SELECT * FROM Tr;"))
    qDebug("error");

Table is inside project folder. It always writes "error", please help.