Hi Hernan,

>I don´t have. My idea is, when a user wants to update a table and that table is being used by another user, I want to know who is the other user and show a message "The user XXXX is using the file" or something like that, but I don´t know how.

if you want to query the information from the server, you need the permissions to do so. Are you using the tables in your application? In this case, you could write a log file when you open a table which you can display on other machines.