I dont quite get you need.

But IF you are just trying to read the ENTIRE file, try (tested)
Code:
var filehandle_n;
filehandle_n=file_open_read ("rss_1.txt"); 
file_str_readto(filehandle_n,rss_down,"",4000);
file_close(filehandle_n);

I think using NULL in file_str_readto just means
"use the normal delimiters and delimit_str".

"There is no fate but what WE make." - CEO Cyberdyne Systems Corp.
A8.30.5 Commercial