EOF is not installed in one of the program files directories, but in the download directory of my mac. I don't get an error 4, but an error 6 code. And I can show the waveform graph and the spectrogram (even both at the same time). So memory is probably not the issue. Also, do you have any idea how I can load mp3's without converting them first with audacity? OK, good news!! I have found and fixed my two problems!! :geek: The problem seems that you really need to, when working with EOF on a windows 8.1 through parallels on a mac, make sure you put EOF (the whole shebang of files and folders and executables) on your windows drive and not on your mac (as i did in my macs download folder). You also need to make sure that your songfolder and mp3 are located on your windows drive!! just put everything on the C-drive of your windows (preferably in the EOF folder, so you can locate everything very easily)... So now, I can load mp3's without any problem, and I also can add a leading silence without any problem...