>Guess what!
>I've already try it and, the problem was that the record was a little bit pass the end of the file.
>That's how the file was looking:
>

>GILL01 0008-HA20000829080000020000000000000000000000000000
>                                          DELR02 0250-AI20000809060053394250000000000000000000000000
>

>I know that the technic is good, the problem is that I have a bug and I can't identify it...

Is that file big? One way that you won't have problem is to create a new file, copying all the old records you already have and then adding your new ones.

Have you tried opening it with DAO or ADO by using a text file provider?