You can download file #9925 and search your project for 'navrefresh'.

>Well, thanks for trying to help me.
>
>This only happens because the user use an hyperterminal connection, i use the same database and try to save a record and it don't place any errors.
>
>And the message says that it's because a method (navrefresh) and i dont know where is it.
>
>Please help.