Hi Ben.

>We have a table with 3 fields : id_husyt c(9), code_typas_inte1 c(10), code_typas_inte2 c(10)
>
>We then modified the table structure like that : id_husyt c(9), code_typas_depar c(10), code_typas_inte1 c(10), code_typas_inte2 c(10), code_typas_inte3 c(10)

The problem is that you have several fields that have duplicated names in the first 10 characters and you switched the order of the fields (code_typas_inte1 is no longer the first field starting with "code_typas"). As a result, VFP changes the name of the "real" field in the DBF file (which is only 10 characters long) behind SDT's back, which then causes problems when the records are appended into the updated table structure.

You noted one solution to the problem. The other is to maintain the original field order (in other words, have code_typas_inte1 come before code_typas_depar in the table structure).

Doug