/LOG
       /NOLOG (default)

    Controls whether the EXCHANGE/NETWORK command displays the file
    specifications of each file copied.

    When you use the /LOG qualifier, the EXCHANGE/NETWORK command
    displays the following for each copy operation:

    o  The file specifications of the input and output files

    o  The number of blocks or the number of records copied
       (depending on whether the file is copied on a block-by-block
       or record-by-record basis)