Use of tcode file

Question

what is the use of tcode file????
what is platform independent file name????

Answer 1

Platform Independent File path: The actual (Physical) file name/path is always dependent on hardware and OS of the system. Now In this transaction define a Logical name of a file and map it to your specific system specific actual path.
Now in your coding you can use the logical name. When you use the same come in a different system you need not change the logical name to everywhere you have coded. The Logical name will be same, only in FILE transaction you will change the mapping of Logical File name to actual file path.
Check the following Link :
http://help.sap.com/saphelp_erp2005/helpdata/EN/8d/3e4edc462a11d189000000e8323d3a/frameset.htm
Example:
Suppose in your application server you created a file and give a logical name as AIRS_PATH. But when you want to access the file you need to know the actual physical path to it. That path may be ‘c:\temp\<FILENAME>’. Now in FILE transaction you mapped AIRS_PATH to c:\temp\<FILENAME>.
So whenever you try to access AIRS_PATH, the system know that you want to access the c:\temp\<FILENAME>.
Now may be you want to run your code in a different system and different hardwre. And the file is stored there in ‘c:\temp\temp1\<FILENAME>’ path. So then in that system you need to map AIRS_PATH with ‘c:\temp\temp1\<FILENAME’.
Now while coding you are not actually familiar or bother the actual file path. You will do your coding based on AIRS_PATH. And that is same in all the system only the mapping need to change. Thus you can achieve the system independence.