Thanks for yours advise, so the problem exactly is that while the user is write down over the form, there is some fields that has to be get in the validate in the table if there is a record with the same attribute.
Them when the rutine is runnig, the system give an error message, "This record is allready on the table, you can not save it...", it is because to the record is save before run the rutine, so when it go find the record into the table it´s found.
How can I do to stop that the VFP, save the record before run the rutine