Silent crash in Visual Studio 2008 c++ application

Hi

We have a unmanaged C++ TCP server application running as a Windows service that is silently crashing after few days of run on Win2003 server. There is no drwtsn log file getting generated (no issue with drwtsn log as it catches other crashes in same application). Due to lack of drwtsn log file, we are unable to progress on how to debug this further..

The TCP server application is sort of HTTP processor. It connects to wide range of webserver and processes data.

Can someone please guide me what can be done to debug the silent crashes.. There are 1000+ users connected to this server at any instant and thus its not possible to run the same in debug mode. The crash is not reproducible and happens once in 5-10 days on one of the 6 servers..



Any tool that can help to debug these silent crashes. The application is a pure C++ application without any MFC or STL..



Thanks in Advance.

Krishna