signal SIGTRAP, code <num>, PC=!XA

  Explanation:  A 'hardware fault' signal was raised as an
  exception in response to the arithmetic or software condition
  specified by the given code.  Decimal overflow, Decimal divide
  by 0, Decimal invalid operand, Assertion error, Null pointer
  error, Stack overflow, String length error, Substring error,
  Range error, and Subscript [n] range error are specific
  conditions producing this signal.

  User Action:  Eliminate the cause of the error condition and
  retry the operation.