1. I have a process model "Main_Process". It wants a pv!letter from the below process it runs
2. Inside I have a Start Process node that calls a process model "Apple". It wants a pv!letter from the below that it runs.
3. Inside "Apple" I have a synchronous sub process "Core" inside that outputs to its parent an important value we will call pv!numberOfSeeds
I can send data between 1 and 2 with activity chaining and outputting variables i want with AC!processinfo.pv
My issue is that when 3 "Core" is involved, I can get nothing out of it, and any variables changes done during or after it are no longer visible in "Main_Process"
Any ideas on how I can get values out of Core to my Main Process?
Main_Process_______________________________________
Apple________________________________________
Core_________________________________________
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You can pass by reference the process variable from Main process -> Apple -> Core. This way updates to that pv in core process will be reflected all the way in the main parent process. However I see you are using Start process smart service which does not support passing by reference so you will have to update this to a sub-process call.
Having said that, passing by reference isn't a best practice if the process variable is a CDT. If you are dealing with CDT's or if you are looking for other alternatives, take a look at the plugin that allows to get and set PV's across processes.https://community.appian.com/b/appmarket/posts/get-and-set-external-process-variables
Passing by reference between apple and core has been attempted already. It has no impact.
You can not pass by reference between a start process node and the process it calls.
Main thing i want addressed is subprocesses break activity chaining which would allow the variables to propagate from core to main. Give it a try. You will find it does not react how you think.