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I am trying to compile a C program that can read and write LARGE FILEs (> 2GB) to IFS. I am using the fopen/fread/fwrite/fclose functions and compiled with the *IFS64IO option. The fread() can read the large file, but fwrite() still fails when it reaches 2GB. I even tried explicitly using fopen64(), etc. Still No Joy. All that happens if I specify '#define __IFS64_IO__' is a warning that I can't redefine the macro. I even called IBM Software Support, and they currently have no ideas about why this is happening. I'd like this to work on V4R5, but would be satisfied with V5R1+. Has ANYONE gotten a C routine to write an IFS file larger than 2GB, and how did you do it? Thanks
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