Napoleon,

That's an ugly error and usually the database become corrupted and you may need to restore from the backup. Before doing any operations, copy your database, then

open database MyDatabase exclusive 
     pack database
     compile database
     validate database recover

Check out your stored procedures and referential integrity.

>Greetings to all,
>When I try adding a new table an error message is shown ".DBC consitenct Error" what should I do, I've read the help and it said that my database is corrupted, I tried deleting the .dcx file but still I cant add new tables, please help.
>
>Thanks,
>Nap