Thank you Marty - i tried both "," and ";" after adding the square bracket and the same happened, BUT! your comment regarding the language pack triggered something... when I installed the language pack there where several options and I chose "Español Internacional" intially, then I decided to install the rest one by one to see if them make any difference... and that seem to work!! I installed the "Español España" Language pack and now it is accepting the formula with the semicolon.
Thanks for your help!
Jose
