How to set up Parent and Child process in Evolve?
For the Parent Form use the Hierarchy Control
For the Child Form use the Data Exchange Control.
Please see below example steps and attached solution where data was getting deleted when user was launching the child form.
For the Launching of Child form perform below steps
(1) Go to parent form and delete form data exchange control from there. Keep only hierarchy control
(2) Deploy parent after making above change
(3) Go to child form and remove hierarchy control. It needs only Data Exchange control.
(4) In child form, go to data exchange control and set Pull parameter to P1=C1
(5) Deploy child form
Make sure the parent and child field are same....If for example parent field is P1 and child field is C1...then it wouldn't work in version 20.0...this is because in 20.0 there is a bug.
Set pull parameter to P1=C1...in foundation it is C1=P1.....this bug will be fixed in 20.1 to make it consistent with foundation
The parameter set in 20.0 will stop working in 20.1 and needs to be manually reversed and deployed again; to avoid it, keep parent and child field name same....so user don't have to change anything after 20.1 upgrade.
Example ticket - https://winshuttlesupport.zendesk.com/agent/tickets/45916