How to get Process ID

You have to pass the process ID of the target process into the recipient process somehow.  The way I've seen this done most successfully in the past is for the target process to save its own process ID to a database table by whatever means you prefer, and then the recipient process either queries this data or receives it as a parameter, and uses the attached pp!id as the target of its send message node.

You have to pass the process ID of the target process into the recipient process somehow.  The way I've seen this done most successfully in the past is for the target process to save its own process ID to a database table by whatever means you prefer, and then the recipient process either queries this data or receives it as a parameter, and uses the attached pp!id as the target of its send message node.