Sub Process vs Start Process

You can see an outline of the differences in staring processes in the docs, here: docs.appian.com/.../Ways_to_Start_a_Process_From_a_Process.html

Thanks that was very useful

I covered some aspects of this in my recent blog post on version 24.4.

https://appian.rocks/2024/12/09/appian-244-insights/

AFAIK this is basically just a case of "feature convergence" - originally-separate features being fleshed-out (separately) to the point where they become nearly interchangeable, if not totally interchangeable.

They may be planning to phase out the classic subprocess node altogether - though it's impossible to say either way.  The "start process" node needs a few more improvements before that can happen, though.

• the node icon needs to let us differentiate synchronous from asynchronous, like the subprocess node currently does and traditionally always has
• it needs to more-flexibly handle opening the subprocess from the parent level; running subprocess instances, for example, as well as subprocess model when defined by expression (at least when defined by something stupidly-easy / nonconditional, like via a single constant)
• probably needs the ability to pass variables by reference, for the rare occurrence when it's the only way to handle something
• when searching a model by name in the process model editor search bar, we need a way to "drag and drop" the target model as a Start Process node instead of (or preferably, in addition to) the classic subprocess node.