Hello friend thanks for your interest in my problem, sorry my English, I'm ecuartoriano and speak Spanish. The problem is: I have a hotel management system, and I have common threads to perform the billing, but from time to time, not always, the bill is not finished printing all, just print a few lines of the bill, and most importantly, the totals do not prints, it creates a problem that the client can not look at what has been consumed, you have to cancel the invoice and print it again, it's a waste of time, and a fatal problem when the client is with the ticket of which he is the plane. The strange thing is that the problem is occasionally, I also the case in the printing of worth in the restaurant when the folio consumption meter (customer statement). Appreciate your help, I've been around all over the internet and can not find anyone who has done the same. Attentively Arcos Alcivar