Saving image fails on other machines

[grabalon]

Try removing the format from the save call, and letting Qt figure it out on its own:

image->save("test.jpg");

image->save("test.jpg");

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[27Loco]

Doesnt work either.

I activated the console and now I got some more information about the problem. This is what I get when I am trying to save the image.

QPainter::begin: Paint device returned engine == 0, type: 3; 
QPainter::save: Painter not active 
QPainter::setClipRect: Painter not active 
QPainter::restore: Unbelanced save/restore 
. 
. 
. 
.
QPainter::end: Painter not active, aborted

QPainter::begin: Paint device returned engine == 0, type: 3; 
QPainter::save: Painter not active 
QPainter::setClipRect: Painter not active 
QPainter::restore: Unbelanced save/restore 
. 
. 
. 
.
QPainter::end: Painter not active, aborted

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SOLVED
rect.size().toSize() was the problem. The size was not valid and therefore the image was invalid. So many hours

Thanks for your help