So, seems like this should be straightforward and yet my UD entries aren't being created, so wondering if someone knows what I'm missing.
Used the customization wizard (Add user defined table as child) on POEntry and bound the PODetail DataView to UD13.
Mapped the following keys:
Company -> Key1
PONum -> Key2
POLine -> Key3
I would expect entries in UD13 to be created when I create a line for the PO but I'm seeing nothing.