Logical command in ABAP.....Urgent

Question

Hi,
  i am pretty new using ABAP program so i neeed help urgently. i am trying to move a file on the application server from one directory to the other and i was using the open dataset function to do that. but the file i am trying to move is pretty big and because i am using internal table to store, it is causing problems with the space.
  i have consulted the basis guys and they have managed to create a logical file for copying from one directory to the other on the application server. to help you furthter. i am enclosing the mail sent to me.
I have created a logical command which should copy the file from one location to the other but you need to pass it the source dir and file name and the destination dir and file name.
The logical command is ZCOPY and uses cmd /c copy
Copies one or more files to another location.
COPY [/V] [/N] [/Y | /-Y] [/Z] [/A | /B ] source [/A | /B]
     [+ source [/A | /B] [+ ...]] [destination [/A | /B]]
  source       Specifies the file or files to be copied.
  /A           Indicates an ASCII text file.
  /B           Indicates a binary file.
  destination  Specifies the directory and/or filename for the new file(s).
  /V           Verifies that new files are written correctly.
  /N           Uses short filename, if available, when copying a file with a
               non-8dot3 name.
  /Y           Suppresses prompting to confirm you want to overwrite an
               existing destination file.
  /-Y          Causes prompting to confirm you want to overwrite an
               existing destination file.
  /Z           Copies networked files in restartable mode.
The switch /Y may be preset in the COPYCMD environment variable.
This may be overridden with /-Y on the command line.  Default is
to prompt on overwrites unless COPY command is being executed from
within a batch script.
the problem now is i have no idea about how to use the logical command. can any one help me.
Thank you,
Ravi.

Answer 1

If memory is not an issue, then there should be no reason why this should not work.
report zrich_0001.
parameters: d1 type localfile default '/usr/sap/TST/SYS/Data1.txt',
            d2 type localfile default '/usr/sap/TST/SYS/Data2.txt'.
data: itab type table of string with header line.
start-of-selection.
* Read old file
  open dataset d1 for input in text mode.
  if sy-subrc = 0.
    do.
      read dataset d1 into itab.
      if sy-subrc <> 0.
        exit.
      endif.
      append itab.
    enddo.
  endif.
  close dataset d1.
* Write to new file
  open dataset d2 for output in text mode.
  loop at itab.
    transfer itab to d2.
  endloop.
  close dataset d2.
* Delete the old file
  delete dataset d1.
Regards,
Rich Heilman