Hi Alankrita a,
The FVA fields currently don't allow some field types in the "field" parameter.
As a workaround, you can create a "fake FVA" using a rule based trigger.
The gist of it is that you add the ibpl field to your child item type with editablity = never (this is to prevent users from accidentally changing the value on the child item)
Then create a trigger that runs when the parent item's ibpl field changes or when the a new child is added to the parent.
The script of that trigger needs to copy the value of the ibpl field from the parent item into the child item.
The details for setting up triggers and writing triggers can be found in the Integrity Administration Guide pdf for your version of Integrity.
Hope that helps,
Matt
