PCAC> SET VERIFY
  PCAC> @X.COM
  @X.COM
  SET DATAFILE [SAGER.TST]PCAPRIME
  SET LANGUAGE C
  PCAC>

      The SET VERIFY command enables input verification. The next
      command entered (@X.COM) is therefore echoed to the terminal.
      Then a SET DATAFILE and a SET LANGUAGE command are read from
      the command procedure X.COM. Both commands are echoed to the
      terminal.