RVDS: file access with Real View Debugger 4.0?

I am using the 'Arm Workbench IDE 4.0'. And I can compile the file access functions

like Following. But when run the image using the 'RealView Debugger v4.0', I can't

find out the xxx.txt file withing the system and ARM tool's directory.

FILE        *pFile=NULL;

pFile = fopen(50, (char*)"c:\\temp\\xxx.txt", "wt");    // 50 is file identifier

rv=ferror(pFile);

rv=fprintf(pFile, "test\n");

if(pFile){

        fclose(pFile);

        pFile = NULL;}

I could have used the 'printf' with debugger tool's stdio so I think that there may be method for file management.

Can I use the file management functions?

And if so how?