Hi, this once worked - but since at least a few months does not. if I set a breakpoint before calling KApplication.exec_(), eric4 stops there but it ignores all later breakpoints any idea? Version Numbers Python 2.6.6 KDE 4.6.2 PyKDE 4.0.2 Qt 4.7.0 PyQt 4.8.1 sip 4.11.2 QScintilla 2.4.5 eric4 4.4.12 (r3937) -- Wolfgang