I have a field with numbers separated by ":" the problem is that I would it also contains other numbers. I need just the 15 digit numbers within the semi colons. An example of what is in the field is :1571144410824900.000000: I just need the 1571144410824900, the 16 digit number. A field might have :1312710607045440.000000:1571144410824900.000000: but I just need the 16 digit numbers before the semi colons. I main will be only one 16 digit number but I am just. Can you help. The Name of the field is Booklist.