in my project I used core data and binding to produce data on document based program. I have used multiple entities and they worked fine and then they stopped working and I don't know why. all the text fields now have "()" in them with space in between them, and will not add to the database. so the field shows a junk value and will not bind properly to the database. how would I start to debug this I have been searching but I don't know where to start, mainly i dont know what the problem is.