You mean how to invoke an external application?
Just have a node (or action) handler use standard java calls to get the runtime from an .exec and get the return value from that.
Anything you can do in java, you can program that into a jBPM node handler.
Thanks a lot for your reply!
According to what you said, if we need to replace the ui of a task by an extance web application, we could write some action in the task .Am i right?
regards and thanks,
or don't use a task but a normal state