OUT OF MEMORY - Error while working with sqlite

[Askar]

Dear Friends,
I am gettting OUT OF MEMORY error while working with sqlite. while executing the following sql statement

QSqlQuery q(db->cn);
        q=db->SelectQuery("SELECT name FROM sqlite_master WHERE name= 'tablename'");//im getting error while executing this stament

QSqlQuery q(db->cn);
        q=db->SelectQuery("SELECT name FROM sqlite_master WHERE name= 'tablename'");//im getting error while executing this stament

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i had used query like this in many part of my project. i am getting error while executing the above query in particular part

out of memory Unable to execute statement

out of memory Unable to execute statement

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i am looking to solve this problem can anybody help me.....

Regards
askar