Hi Maeve,
The EABO fail is quite a generic fail. It basically means that the I/O being performed has been aborted. There are many possible reasons for this. Without further detials of the hardware, software and PC that you are using it is difficult to narrow down.
What I would suggest is to visit our knowledge base, there are multiple entires on this possible fail and solutions to fixing the problem. Follow this link below and do a search on EABO, you should get several good his.
http://digital.ni.com/public.nsf/MainPage?OpenForm&node=133020_US - Use EABO as your search criteria
Hopefully you should find a solution here. If not could you post details of the hardware, software and PC that you are using and I will see if we can narrow it down.
Best regards,
Matt Poole | Applications Engineer | National Instruments