Unsolved QStringList index problem

[CarlaHowlett]

I would like to ask for help.

If I write follow code (gep_pakli is a QStringList), then I get an error during running:
kartya = gep_pakli.at(i);

but if I write follow code then running without error:
kartya = gep_pakli.at(3);

Why not working if I use (int) variable?

Error:
ASSERT failure in QList<T>::take: "index out of range", file /Users/ivanicsmark/Qt5.2.1/5.2.1/clang_64/lib/QtCore.framework/Headers/qlist.h, line 488

(I use OS X, but I would like use on Windows later.)

[edit: Fixed coding tags SGaist]

[SGaist]

Hi and welcome to devnet,

What value is i when it crashes ? It should be between 0 and gep_pakli.count() - 1