>Happy new year to all....
>I can't add a new record into my table. It says "Primary key uniqueness violated" How comes the problem?

Obviously, you have primary index tag and try to add record with existing value in appropriate primary key field(s). The problem usually appears when you use APPEND BLANK, the usual remedy is to generate primary key value by using function as field default value (you may look into Tastrade sample to see some examples).