Still QSqlTableModel and friends trouble

[waynew]

Maybe what I am trying to do is not possible?
Declared the following in a function:

QSqlTableModel *model = new QSqlTableModel(this, logdb);
 QTableView *view = new QTableView();
 QHeaderView *header = new QHeaderView(Qt::Horizontal);

QSqlTableModel *model = new QSqlTableModel(this, logdb);
 QTableView *view = new QTableView();
 QHeaderView *header = new QHeaderView(Qt::Horizontal);

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If it any of these are referenced within the function after they are created, all is well.
If you try to reference say the header, in a different function, maybe to save it - crash.
No doubt null pointer exception, but why? Shouldn't the header still exist?

It seems the design of QSqlTableModel prevents declaring it as a class member since you can't assign a different database to it later. So it would only be good for one database.

Am I missing something here? Or should I try a completely different approach?