dynamic register allocation algorithm has failed

  Explanation:  A register allocation algorithm internal to Oracle
  Rdb  has failed while generating code to evaluate an expression.
  In theory this message should never get through to the user.

  User Action:  Contact your  Oracle  support  representative  for
  assistance.   You  will  need  to  provide  the  statements that
  produced  this  error.   Using  parentheses  again  around   the
  problematic expression may give you a workaround.