VMS Help FORTRAN, Statements, ENDFILE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Writes an end of file record to a file.  An end of file record
  consists of one byte with the ASCII value 26 (CTRL/Z).  An end-file
  record can be written only to sequential organization files that
  are accessed as formatted sequential files or unformatted segmented
  sequential files.  Statement format:

     ENDFILE ([UNIT=]u[,ERR=s][,IOSTAT=ios])
     ENDFILE u

     u    Is an integer variable or constant specifying
          the logical unit number of the file, optionally
          prefaced by UNIT=.  UNIT= is required if unit is
          not the first I/O specifier.

     s    Is the label of a statement to which control is
          transferred if an error occurs, prefaced by ERR=.

     ios  Is an integer variable to which the completion
          status of the I/O operation is returned, prefaced
          by IOSTAT= (a zero if no error occurs; a positive
          value if an error occurs).

  If the unit specified in the ENDFILE statement is not open, the
  default file is opened for unformatted output.

  An end-of-file record consists of one byte with the ASCII value 26
  (Ctrl/Z).  An end-of-file record can be written only to sequential
  organization files that are accessed as formatted sequential files
  or unformatted segmented sequential files.

  An ENDFILE statement must not be specified for a file that is open
  for direct access.  End-of-file records should not be written in
  files that are read by programs written in a language other than
  Fortran.