NUMBER:  68

  ERROR CODE:  F

  MESSAGE TEXT:  variable format expression value error

  EXPLANATION:  The value of a variable format expression was not
  within the range acceptable for its intended use; for example, a
  field width was less than or equal to zero.  A value of one was
  assumed, except for a P edit descriptor, for which a value of zero
  was assumed.

  The ERR transfer is taken after completion of the I/O statement for
  this error number.  The resulting file status and record position
  are the same as if no error had occurred.  However, other I/O
  errors take the ERR transfer as soon as the error is detected, so
  file states and record position are undefined.