It may be because, @DocNumber is generated just before the html of of the view is pushed to the requesting client, that it is not available for any calculations based on it. I would like to have this formula available for calculations.
Welcome to IdeaJam™
You can run IdeaJam™ in your company. It's easy to install, setup and customize. Your employees, partners and customers will immediately see results.
Use IdeaJam to:
Collect ideas from employees
Solicit feedback and suggestions from employees and customers
Run innovation contests and competitions
Use the power of "crowd-sourcing" to rank ideas and allow the best ideas to rise to the top
IdeaJam™ works with:
IBM Lotus Quickr
Blogs and Wikis
and other applications.
IdeaJam has an extensive set of widgets and API's that allow you to extend and integrate IdeaJam™ with other applications.