I went to my handy Italian verb conjugator and couldn't even find "aver" as a form of avere either used as an auxiliary verb with "perdere" (http://www.italian-verbs.com/italian-verbs/conjugation.php?parola=perdere) or on its own (http://www.italian-verbs.com/italian-verbs/conjugation.php?parola=avere).
I'm sure I'm missing something, but I can't figure out what it is!