Database Connect Problem, Out Of Memory

[Taz742]

@the_
Now I reload my program and everything is corrected.
Unfortunately I could not find the error.

[SGaist]

Hi,

There's something fishy in your database name. It looks likes there's an invisible character before the C:. You should erase and rewrite that line completely.

[Taz742]

@SGaist
I do not understand where to delete.
When I did a new database, i got to do the same Error.

[jsulm]

@Taz742 In

db.setDatabaseName("‪C:/Users/User/Desktop/newdata.db");

delete "‪C:/Users/User/Desktop/newdata.db" and enter it again...

[J.Hilk]

@Taz742
Also do not use Copy&Paste, ctrl+c /ctrl+v, type it!

[Taz742]

@jsulm
So?

    delete "‪C:/Users/tleladze/Desktop/valuta/dbbb.sqlite";

    db.setDatabaseName("‪C:/Users/tleladze/Desktop/valuta/dbbb.sqlite");
    if(db.open()){
        qDebug() << "db opened";
    }else qDebug() << db.lastError();

So do not work anyway.

[Taz742]

This post is deleted!

[Taz742]

@Taz742
this problem not solved. i randomly select correct answer.

[sierdzio]

@Taz742 I've moved it back to unsolved state. Good luck :-)

[SGaist]

Do you still have an error similar to QSqlError("-1", "Error opening database", "out of memory") "\u202AC:/Users/User/Desktop/newdata.db" ?

The \u202A is important here. It's likely the source of your problem since with it, the path points to an invalid location. So what was suggested was to delete the line of code containing the setDatabaseName call and rewrite it completely (i.e. without copy/paste) to ensure there's no funky character in it.

[jsulm]

@Taz742 "So do not work anyway" - what is the error message now?

[Taz742]

@jsulm
The same error

[mrjj]

@Taz742
Hi
Could you perhaps open the DB in
http://sqlitebrowser.org/
and see what it says ?

If its not the ""\u202A" char that gives this, then it could be great to see if other sqllite
program loads it without any errors.

[Taz742]

@Taz742
Yes same error.
When I saw this problem for the first time, it happened while I was server (the server I'm working on a project RDP) I copied down the entire project on my computer. After "QSqlError (" - 1 "," Error opening database "," out of memory ")" \ u202AC: /Users/User/Desktop/newdata.db ", this problem has emerged in both the server and my computer, when an application started .

[Taz742]

@mrjj
I have not seen any hacking \ u202A problem. :/

[mrjj]

@Taz742
and what did SQLBrowser say?

Update:
This error can come from things NOT related to memory at all. it seems
http://servalpaul.blogspot.dk/2011/12/misleading-out-of-memory-error-in.html

[the_]

@mrjj
In most cases it has to do with write permissions. Had the same error when trying to create a sqlite database in a location with no write access for the user.

[mrjj]

@the_
Good info.
So in any case its misleading as hell :)

[the_]

@mrjj
this was my first guess here too.

@Taz742
does the db file exist when you start your program? if yes, can you access it using QFile with the given path, try to open(QFile::ReadOnly) and read it? (would be binary content only)

[Taz742]

@the_

Did you see the file in the address really exists?
And answer Is:

    db = QSqlDatabase::addDatabase("QSQLITE");

    db.setDatabaseName("‪C:/Users/tleladze/Desktop/valuta/dbbb.sqlite");
    if(db.open()){
        qDebug() << "db opened";
    }
    else
        qDebug() << db.lastError();

    QString paths = "‪C:/Users/tleladze/Desktop/valuta/dbbb.sqlite";

    QFile* file = new QFile(paths);

    if(!file->open(QIODevice::ReadOnly)){
        qDebug() << "Filed To Open";
    }

QSqlError("-1", "Error opening database", "out of memory")
Filed To Open