on a client script, how would i determine if a line is being added or updated? For example, if a user creates a new line on item sublist and selects "Add" I want to add another line with a set item. But if they are just modifying an existing line i don't want the new line added.

you can catch the new line item using the clientscript "validateLine"

@Tyn Guardian unfortunately it fires on both new line and updating lines.

you can return false if you dont want the entry to be saved

right but how do it tell the difference between a new line and a line that is just being updated

well there is a validateInsert for new item

hm for some reason I can't get validateInsert to fire when i add a new line

I have an idea, but it might not be the right solution You could loop the lines and store it as a global variable/constant during pageInit, then check against this with validateInsert/balidateLine

I'd just track the line count from currentRecord

@ehcanadian @Sciuridae54696d great ideas, thanks!