Reference to using a macro utility and others to run reports from Desktop instead of using tabcmd: http://community.tableausoftware.com/message/249298#249298
From Russell Christopher:
This was yesterday’s contribution to a Tableau forums discussion on data extracts, I thought it deserved a separate post that I could keep updated. There are some subtle behaviors and idiosyncracies in working with data connections, Tableau data extracts, and Tableau Server that aren’t fully fleshed out in the documentation, here’s my attempt! I start out with a review of the common file types and .twb vs. .twbx, and then get into some details on different types of connections and what happens based on different orders of operations, and toss in a gratuitous Buffy reference.
Here’s the thread http://community.tableausoftware.com/message/292718?et=watches.email.thread#292718 and the tool Shawn mentioned http://www.winautomation.com/