BPC NW 10.0 - BPF task creation issue

Dear All,

I have the following main/sub processes and need to create/implement BPF tasks for this:

Main Process 10

               Sub Process 11

               Sub Process 12

               ---------------------

               Sub Process 1n

Main Process 20

               Sub Process 21

               Sub Process 22

               ---------------------

               Sub Process 2n

The requirement is:

Sub Process 21 should be enabled only when Sub-Process 1n is completed. Pls. note that, these two processes are coming under DIFFERENT MAIN processes.

How can I implement this?

Thank you.

Regards,

Peri