Hi, I had a problem using wxPython together with twisted. The following code shows, that one has to start the reactor with the flag "installSignalHandlers=0", otherwise an SystemError occures. How does this affect my Twsited-Application? regards, Thorsten import traceback from wxPython.wx import * from twisted.internet import reactor class MyApp(wxApp): def OnInit(self): # Twisted Reactor Code print "reator start running" #reactor.startRunning(installSignalHandlers=0) #reactor.startRunning(installSignalHandlers=1) timerid = wxNewId() EVT_TIMER(self,timerid,self.OnTimer) self.timer=wxTimer(self,timerid) self.timer.Start(100,True) # End Twisted Code # Do whatever you need to do here return True def OnTimer(self,event): reactor.runUntilCurrent() reactor.doIteration(0) def main(): """ """ try: app = MyApp(0) print "CALLING MAIN LOOP" app.MainLoop() print "MAIN LOOP DONE" except SystemExit, err: print err except: exc_info = sys.exc_info() print "--------------------- CAUGHT EXCECPTION:", exc_info traceback.print_exc(file=sys.stdout) if __name__ == "__main__": try: main() finally: print "MAIN THREAD HAS EXITED" The following error occures on Windows 2000, Python 2.3.2 and wxPython 2.4.2: D:\Python23\lib\fcntl.py:7: DeprecationWarning: the FCNTL module is deprecated; please use fcntl DeprecationWarning) reator start running --------------------- CAUGHT EXCECPTION: (<class exceptions.SystemError at 0x007780F0>, <exceptions.SystemError instance at 0x011775D0>, <traceback object at 0x011775F8>) Traceback (most recent call last): File "E:\bbot\nextbot\gui\wxpython\application.py", line 41, in main app = MyApp(0) File "D:\Python23\lib\site-packages\wxPython\wx.py", line 1945, in __init__ _wxStart(self.OnInit) File "E:\bbot\nextbot\gui\wxpython\application.py", line 18, in OnInit reactor.startRunning(installSignalHandlers=1) File "D:\Python23\Lib\site-packages\twisted\internet\default.py", line 115, in startRunning self._handleSignals() File "D:\Python23\Lib\site-packages\twisted\internet\default.py", line 87, in _handleSignals signal.signal(signal.SIGINT, self.sigInt) SystemError: error return without exception set -- brainbot technologies AG boppstrasse . 64 . 55118 mainz . germany fon +49 6131 211639-1 . fax +49 6131 211639-2 http://brainbot.com/ mailto:henni@brainbot.com