Getting process instance id from within java control

Question

Hi,
here's a brief description of what i need to do. I have a group of processes which i start using one common interface (jpd control). the problem is, that when new process is created it needs to be added to a db table. So to have this done automatically i created a java control with a variable of jpd control. information that needs to be put in db is the process instance id.
does anyone have any idea why after calling clientRequest (without return) method getConversationID() of the process control gives null as a result? i'm sure that the process was successfully started and completed.
i don't know if this can have an influence on this, but this happens only if process is started from another process which was started in the same way from yet another process. to make it more clear...
baseProcess -> (startSubprocess -> startsubSubprocess)
both subprocesses are started in the same way from java control, but in the subprocess of the subprocess one getConversationID() returns null.

Answer 1

i found the solution, which is that process controls should be generated from statefull process. when the process was stateless calling getConversationID() method from process control returned null.