Bluetooth file transfers from Sony Arc S always get interrupted
I once got that on my Xperia phone when I was transferring a 150 MB file over bluetooth.

Some things you can try:


Try transferring another file. If it transfers, send the other file.
If your phone is too close to the other device try moving your phone away from it.
Turn off bluetooth, then turn it back on.
Pair the device(s) with the phone.