it's not there yet.... look at the jira, there is an issue for this....
I am also using Eclipse 3.3 with jbpm-jpdl-designer-3.1.2. I click a task node, then in the properties view, click the tasks tab. I click a task defined there, and then the Details tab. When I click Generate Form..., none of the form fields or buttons are populated with the process variables that I specified using the default controller.
I'm a little confused regarding the history of this item. I checked JIRA as you suggested, which implies  that the form generation feature has not been completed. I note that this item was logged in July 2006 and wonder if it is still relevant or I am simply misunderstanding something.
What confuses me is others seem to be using this functionality. For example, in a chapter from "Business Process Management with JBoss jBPM" available at , the author clearly generated some forms using the designer.
Does anyone know if this item is planning to be fixed in a future release...or is it already working for others in a different configuration than I am using?
Thanks in advance!
- it is not working
- the planning is in the jira (if it has an 'fix version')
- others that use it manually populate it
I would also recommend using jbpm-jpdl3.2.2 suite instead of 3.1.x since some of the task nodes functionality is better in that version.
I also tried to follow the Cumberlidge book, but have reverted over to playing with the 3.2.2 websale demo and using the getting started wiki.