The right approach to "ask" data to the running thread..

[jacek]

The problem might be in automatic connections. QThread object lives in the GUI thread, so automatic connections between widgets and the thread object will behave like if they were direct, which might cause troubles.

This problem was discussed several times, so please search the forum. A few examples:
http://www.qtcentre.org/forum/f-qt-p...eads-6060.html
http://www.qtcentre.org/forum/f-qt-p...read-3943.html

[sylvaticus]

Thanks for the explanation & the links.....