qwtPlot->replot() results in segmentation fault

[kaizimir]

Hmmm, it's public... I can't guess what difference it makes.?

Ok, I also tried the public inheritance. Nothing changes.

Then I put the code from the first post into the 'Ui_MainWindow' class. It works. This of course not what I want to code. But I am puzzled, what that could mean.

Any help is highly appreciated.

greetz, kai