Aircrack-ng unable to receive handshake

following Jason Dion’s course " WiFi Hacking: Wireless Penetration Testing for Beginners". I am trying to do a dictionary attack on my test access point. I’m able to capture frames and then i do a deauth which works fine. When I use the cap file against my dictionary file i receive WPA(0 handshake) and packets contained on EAPOL data; unable to process this AP.
I have ran it about 3 times now and have captured 58,000 packets . What am i missing?
thanks, stuart

other forums say you hvnt got a real hanshake file. you need to repeat the steps untill you get a hanshake file with key.