The sp-close command closes all current spooler entries previously opened by the current line with an sp-open command or an o option in conjunction with an sp-assign command.
sp-close
When an sp-open is in effect, it is necessary to do an sp-close to complete output of the job. This is especially noticeable when spooling directly to UNIX or to tape.
sp-close [1140] your open files were closed.