Hi, I hope some one could offer me some help on this. I am quite new to both python and twisted. The thing I do may sounds a bit wierd. I am using a pyicq-0.6-t. As pyicq-0.6-t only works with twisted-2.2 or earlier, so I chose to install twisted-2.2. However, I wished to use epollreactor as the default selectreactor only supports 1024 file descriptors. So I copied the relevant files of epollreactor which is installed on twisted-2.5 to the site-packages/twisted-2.2 directory. I copied 5 files in the total, epollreactor.py, epoll..pyx to the twisted/internet directory, _epoll.py _epoll.pyc and _epoll.so to twisted/python directory. I can't remember the exact file names. I copied it with a hope that it works. I am not sure whether I am doing thing stupid here. correct me if I am. The thing is, after I changed the reactor.py to import epollreactor, pyicq-0.6-t seems to be using epollreactor but it still can only supports 1024 open sockets. I thought the problem is only in selectreactor? I figured this out by doing a netstat -a -n on linux and found that pyicq-0.6-t only opened about 1017 maximum concurrent sockets. I presume that would mean only around 1000 connections can be made. Although strange, but I do have a reason to use pyicq-0.6-t which is an outdated version. thanks a lot. regards, Steven Notice The information in this message is confidential and may be legally privileged. It is intended solely for the addressee. Access to this message by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying or distribution of the message, or any action taken by you in reliance on it, is prohibited and may be unlawful. If you have received this message in error, please delete it and contact the sender immediately. Thank you.