Identify duplicate records & increment

Discussion created by cgraves-esriaustralia-com-au-esridist on Sep 23, 2012
Latest reply on Sep 27, 2012 by cgraves-esriaustralia-com-au-esridist
Hey GIS Users,

I'm trying to identify duplicate records from a field and then change these records so they become unique by assigning at the end

of text string A,B,C, or 1,2,3 (eg F3241 A56_A or F3241 A56_1).

I would like to make the change in the field the records are stored in and not create another field. Also, I'm looking to perform this

as part of a bigger function using modelbuilder so would like to use field calculator or a python script so I can place it in the model.

I've attached a screenshot of the field & records I'm trying to identify & increment.

Any input into to this would be greatly appreciated.