User Action from a read only form - BPM Talk

How to initiate an action from a form.

What is actually very useful here is the ability to invoke an action on another folder. This may be very useful, and is something that is requested often. I must say that we do not tend to do this ourselves.

in reference to:

"Initiating a user action from a form can be a useful and efficient design tip.  It is quite possible to launch a user action from a button, but only within the same workflow and from a read only view.  The reason the folder needs to be in read only mode is because when the folder is in ‘action’ mode, the folder row is locked on the database.  To my knowledge and testing, I’m unable to open just any old folder action (so an action from a different workflow within the same procedure file).  For launching an action from a button, here’s how its done:"
- Metastorm BPM : User Action from a read only form « Bpm Talk (view on Google Sidewiki)