I don't think you need the NextID stuff if you need a simple PK, just add a C(10) field and populate it with SYS(2015) when a new record is added either through INSERT INTO or REPLACE.

>Yes, I'm thinking, this might be necessary, and also the simplest solution. On the other hand, I now would need to add NextID table, SP, etc. I was hoping, may be there is workaround... Anyway, I just accidentally zaped this table, so adding PK would not be a big problem... :)