I thought that the CRC could be the problem because it caused already trouble in a synopsis file. But I honestly don’t know where the problem exactly is because all I get is this unclear error message:
I tried it with a SNES, NES, N64, PS1 and Genesis synopsis file. The only file that was working was Genesis. At all the others I get the same error. I also uploaded the SNES one so you can test it yourself.