Fernando, that event seems to be shrouded in mystery...according to JoniMitchell.com:
**In August, a super concert called "Guitar Legends" was announced to be held in Seville, Spain from October 15-19. Though she was announced as one of the performers, for unknown reasons Joni withdrew from the shows the month before the concert took place.** Wish she would have made it - it would have been a good memory for you, I'm sure. Bob NP: Mary Chapin-Carpenter, "Rhythm of the Blues"