I am sorry if this is too elementary, I upgraded from FMPro8 when Win10 hit me. I have 20 years of back files I update every year. I need a new summary variable for this year for a critical file. I go to File, Manage, Database, create field, type in the name, hit create, hit Total of, hit running total, and try to pick the field I put in for 2016, Total16. It is there but in gray and will not respond. What IS picked is the same field from 2007, Total07. I cannot get it to get off this field. Help!!!