Error while hashing a torrent piece

[bittiez]

I can't seem to figure out why I am getting this error, does anyone have any idea?

47 [JavaFX Application Thread] INFO com.turn.ttorrent.common.Torrent - Single-file torrent information:
47 [JavaFX Application Thread] INFO com.turn.ttorrent.common.Torrent -   Torrent name: ubuntu-15.04-desktop-amd64.iso
47 [JavaFX Application Thread] INFO com.turn.ttorrent.common.Torrent -   Announced at:
49 [JavaFX Application Thread] INFO com.turn.ttorrent.common.Torrent -      1. http://torrent.ubuntu.com:6969/announce
49 [JavaFX Application Thread] INFO com.turn.ttorrent.common.Torrent -      2. http://ipv6.torrent.ubuntu.com:6969/announce
58 [JavaFX Application Thread] INFO com.turn.ttorrent.common.Torrent -   Created on..: Thu Apr 23 04:50:37 MDT 2015
58 [JavaFX Application Thread] INFO com.turn.ttorrent.common.Torrent -   Comment.....: Ubuntu CD releases.ubuntu.com
58 [JavaFX Application Thread] INFO com.turn.ttorrent.common.Torrent -   Pieces......: 2196 piece(s) (524288 byte(s)/piece)
58 [JavaFX Application Thread] INFO com.turn.ttorrent.common.Torrent -   Total size..: 1,150,844,928 byte(s)
63 [JavaFX Application Thread] INFO com.turn.ttorrent.client.storage.FileStorage - Initialized byte storage file at C:\Users\tad\Downloads\ubuntu-15.04-desktop-amd64.iso.part (0+1150844928 byte(s)).
63 [JavaFX Application Thread] INFO com.turn.ttorrent.client.storage.FileCollectionStorage - Initialized torrent byte storage on 1 file(s) (1150844928 total byte(s)).
128 [JavaFX Application Thread] INFO com.turn.ttorrent.client.ConnectionHandler - Listening for incoming connections on tad-laptop/192.168.1.15:6881.
135 [JavaFX Application Thread] INFO com.turn.ttorrent.client.announce.Announce - Initialized announce sub-system with 2 trackers on ubuntu-15.04-desktop-amd64.iso.
135 [JavaFX Application Thread] INFO com.turn.ttorrent.client.Client - BitTorrent client [..646537] for ubuntu-15.04-desktop-amd64.iso started and listening at 192.168.1.15:6881...
138 [bt-client(..646537)] INFO com.turn.ttorrent.client.SharedTorrent - Analyzing local data for ubuntu-15.04-desktop-amd64.iso with 4 threads (2196 pieces)...
150 [bt-client(..646537)] WARN com.turn.ttorrent.client.Client - Error while initializing torrent data: Error while hashing a torrent piece!!