in editable grid, selection works when selection style is row-highlight but not for checkbox

Question

I am creating editable tree grid. I want to save the identifier value in local!selection. GridLayout and GridRowLayout are in two different rules. GridLayout in an interface and GridRowLayout is in a expression rule. the selection saves values in local when the selection style is "ROW_HIGHLIGHT" but not "CHECKBOX" 
 Can anyone help me resolve this issue?

Mike Schmitt · Answer

Can you share the code you're using for your Selection Save Into parameter, at the very least? Without this (and perhaps some demonstrative screenshots), it's very hard for anyone here to make any guesses as to what the issue might be in your case.