@CLOSE
The @CLOSE command terminates a user session. It does not require the nnnn specification.
This command must be issued at the end of a program. The command must not be issued in modules called by a main program.
The syntax of the command is as follows:
To store user data in the system file, RECORD-BUFOPN may be presented with data, and the keyword USERDATA must be specified. For example:
@CLOSE.
@CLOSE USERDATA.