A message of  "-1 Accounts created" on the End of Year Closing process report could be caused by one of the following activities. 

Note: You have already run the End of Year Closing process at least once already for this time period (e.g. assuming a close of 2010 into 2011).
  • You marked an account inactive in the 2010 year and the year end balance was $0.
  • You deleted an account in the 2010 year.