From: Warren Young
Date: July 14 2005 6:49pm
Subject: Re: Unresolved External Symbol
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Brian Farmer wrote:
> mysqlpp::Connection::Connection(void)" (??0Connection@mysqlpp@@QAE@XZ)

You've got old headers hanging around somewhere, or modules still built 
against those old headers.  There is no Connection ctor taking void any 
more.