However, the new feature under Edit, EDIT MASTER SOURCES which allows you to fix the duplicate sources by a REPLACE option works up to a point. Apparently if you have an extremely large file like mine, it goes soothly up to a point and then either it is a parameter problem or it is allowing only so many Header Titles for the group of duplicates it puts together. It gets to point where it pops up an error message, FILE MAY BE DAMAGED, OPEN UP BACKUP. The reason I know this is so is because when I saw I could no longer go any further after opening up back up after backup done before I started to do it all, even using different sources to REPLACE each time. At a certain point it just has enough and you can do no more of them.