well the problem is this:
i created a mask to do a certain kind of document (using a submask too)
i created a report
i put a key to print the report (just the one with the right id and date)
what i get are several copies of the report (the number of copies is the same of the number of items in the submask)
But i need to have JUST ONE document printed
What should i do?
Where did i do wrong?

What are you saying when you say mask?

..."form"...i mean "form": "mask" is just the letter-by-letter translation of the italian "maschera"...just a mistake due to italian's poor english

...what i mean is that i did a form (containing the data of the customer, date of the commercial order, data of the order itself, in the main form and, in the sub form, all the products ordered with their commercial codes, description and price);
than i prepared the report and placed a key in the form to print the order i'm preparing or that i'm looking at;
if i have just one product in the sub form i get just one copy of the report;
but if i have three or four products, i get the same number of copies