Error messages

Sorry, this morning I got the following errors: "Ricerca delle concordanze non riuscita. Riferimento a un oggetto non impostato su un'istanza di oggetto." and then "Eccezione generata dalla destinazione di una chiamata." This happened when trying to search a word with concordance from all the projects on which I am working and checking the prject settings status. These projects are in different languages and made of one single doc file each one, so no multiple files for each project and no excel, just doc. Is anybody helping me? I am in a huge trouble! Thanks!