Closes a file that was opened for input  or  output  with  the  OPEN
  command,  and deassigns the logical name specified when the file was
  opened.

  Format:


    CLOSE  logical-name[:]

Additional information available:

ParametersCommand QualifiersExamples

 logical-name[:]

  Specifies the logical name assigned to the file when it  was  opened
  with the OPEN command.

Additional information available:

/ERROR/LOG

 /ERROR=label

 Specifies a label in the command procedure to receive control  if  an
  error  occurs  when  you are closing a file that was opened with the
  OPEN command.  The error routine specified for this qualifier  takes
  precedence over any action statement indicated in an ON command.  If
  /ERROR is not specified and an error occurs during  the  closing  of
  the file, the current ON condition action is taken.

  If an error occurs  and  the  target  label  is  successfully  given
  control,  the  global  symbol $STATUS retains the code for the error
  that caused the error path to be taken.

 /LOG (default)
 /NOLOG

  Controls whether a warning message is generated when you attempt  to
  close  a file that was not opened by DCL.  If you specify the /ERROR
  qualifier, the /LOG qualifier has no effect.  If the  file  has  not
  been  opened  by  DCL,  the  error branch is taken and no message is
  displayed.

  1.   $ OPEN/READ INPUT_FILE   TEST.DAT
       $ READ_LOOP:
       $ READ/END_OF_FILE=NO_MORE  INPUT_FILE  DATA_LINE
          .
          .
          .
       $ GOTO READ_LOOP
       $ NO_MORE:
       $ CLOSE INPUT_FILE

  The OPEN command opens the file TEST.DAT and assigns it the  logical
  name  of INPUT_FILE.  The /END_OF_FILE qualifier on the READ command
  requests  that,  when  the  end-of-file  is  reached,  the   command
  interpreter  should  transfer  control  to  the  line  at  the label
  NO_MORE.  The CLOSE command closes the input file.

  2. $ @READFILE
       ^Y
       $ STOP
       $ SHOW LOGICAL/PROCESS
          .
          .
          .
         "INFILE" = "_DB1"
         "OUTFILE" = "_DB1"
       $ CLOSE INFILE
       $ CLOSE OUTFILE


  CTRL/Y  interrupts  the   execution   of   the   command   procedure
  READFILE.COM.  Then, the STOP command stops the procedure.  The SHOW
  LOGICAL/PROCESS command displays the names that currently  exist  in
  the  process  logical  name  table.   Among the names listed are the
  logical names INFILE and OUTFILE, assigned by OPEN commands  in  the
  procedure READFILE.COM.

  The CLOSE commands close these files and deassign the logical names.