BACERR

 NUMBER:  23

 ERROR CODE:  F

 MESSAGE TEXT:  BACKSPACE error

 EXPLANATION:  One of the following conditions occurred:

  o  The file was not a sequential organization file.

  o  The file was not opened for sequential access.  (A unit opened
     for append access may not be backspaced until a REWIND
     statement is executed for that unit.)

  o  RMS detected an error condition during execution of a BACKSPACE
     statement.