Qt -- program that uses SQLite crashes

Question

I have an application that uses SQLite via Qt libraries (I mean QSqlDatabase). When I run this application from Qt Creator (both in Debug and Release configurations), all works as expected, but when I trying to start an application via .exe file manually, it crashes right after SQLite database operations. I already have "sqldrivers" directory with "qsqlite.dll" file right next to the executable. There's no exception, because I already have a try-catch block around the function that works with SQLite.

What am I doing wrong? How can I fix it?

I'm using Qt5 and MSVC-11.0

Thanks in advance.

Have you placed the SQLite database file alongside your exe? — Nejat
– Nejat, Commented May 12, 2014 at 9:25
I have the hardcoded path inside my program. Also I noticed that QSqlDatabase::drivers functions doesn't return anything in case of manually launch of .exe file — FrozenHeart
– FrozenHeart, Commented May 12, 2014 at 9:30
Do you have "Qt5sql.dll" alongside your exe and "qsqlite.dll" inside "sqldrivers" folder? — Nejat
– Nejat, Commented May 12, 2014 at 9:34
@FrozenHeart when the list that QSqlDatabase::drivers() returns is empty then the loading of the libraries failed for some reason. — Zaiborg
– Zaiborg, Commented May 12, 2014 at 9:42

Donald Duck is with Ukraine · Accepted Answer · 2017-08-26 10:22:53Z

0

It crashes ... due what? (access violation, assertion)

you can add some logging to see how far your code executes before refusing its job. using QTextStream, a redirected qDebug(), std::ofstream or even a fprintf() call will do.

btw Qt does not use exceptions due compatibility to some platforms ...

edited Aug 26, 2017 at 10:22

Donald Duck is with Ukraine

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answered May 12, 2014 at 9:34

Zaiborg

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2 Comments

FrozenHeart Over a year ago

It crashes right after QSqlDatabase::addDatabase function call. There is no messages / standard Windows message boxes / etc

Donald Duck is with Ukraine Over a year ago

Please don't abuse code formatting

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