Closes a file opened with the OPEN command and deassigns the
associated logical name. (Files that are opened for reading or writing
at DCL command level stay open until explicitly closed with the CLOSE
command or until the process terminates.)

Format
 CLOSE logical-name[:]

Additional information available:

ParameterQualifiers

logical-name
 Logical name associated with the file.

Additional information available:

/ERROR/LOG

 Specifies a label in the command procedure to receive control if the
 CLOSE operation results in an error. Overrides any ON condition action
 specified and sets $STATUS to success.

 /NOLOG
 Generates a warning message 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.