Hi Vincent.

The program generated the PDF fine in the CACHE folder in reports, but I did not tell it the output medium.
I also observed that if the CACHE folder does not exist there is an error, it would be good for DR8 to create it automatically if it does not exist.

Code:
Object oOutputToCombo is a cWebCombo
                Set piColumnSpan to 5
                Set psLabel to "Salida"
                Set pbServerOnChange to True
                 Set piLabelOffset to 50

                Procedure OnChange String sNewValue String sOldValue
                    WebSet pbRender of oReportResults to (sNewValue = "V")
                End_Procedure

                Procedure OnFill
                  Send AddComboItem "V" "Embedded Viewer (iFrame)"
                    Send AddComboItem "N" "Nueva ventana"
                    Send AddComboItem "T" "Nueva Tab"
                   Send AddComboItem "S" "Misma Ventana"
                End_Procedure

                Set psValue to "T"
  End_Object
Edgar