when i finish running my app i get this msg:

How can i correct this?
I'm using winXP Pro, MySql 4.0.12-nt, hibernate 2.1 and j2sdk1.4.2_03
thanks in advance

could you please provide a sample of your code i.e. the try-catch-finally of creating a session, executing a method, committing and closing the session etc? also, please provide your version.

here

in your total() method you open a session but never close it. The same in listaComRel(). And in totalNegMat().

A few hints for the rest of your code.

Why don't you combine all 7 HibernateExceptions in your setTudo() method? Just catch the 7 lines with one exception. The HibernateException message should be clear enough for you to see where the error is.

Also don't open and close a session for every single database call. See http://www.hibernate.org/168.html for more info on this.

Peter

thank you