BootDreams Error?

[1magus]

I have never gotten this error before and I have burned this emulator 3 times I just decided to add ALL the PICS for the ROMs that I have, this is a SMS emulator but anyway the file size is now over 300 MBs and when I try to get Boot Dreams to make me a image it just goes through a DOS line really fast than it says ERROR: "Data.iso not found" and crashes, does anybody know what this means??

[fackue]

Try replacing mkisofs with the binary found here. Remember to grab the DLL archive for mkisofs, too.