Afternoon all, I'm using the ASIO library to develop a simple application and have a favour to ask. Up until now I have been making many mistakes as I expected, but what I didn't expect was having so much trouble debugging the problems. Perhaps this is normal for applications with threads and callbacks. Any insight you could share about your development work flow and use of debuggers would be gratefully received. I'm using MinGW and VS2K8 on XP and with either debugger trying to find the context of the devassert/exception is hard. Simon P. S. This is a repost, I think our mail server ate the original as I saw no sign of it on the list. Apologies if I'm wrong.