so i've got this patch (max 4.6 on osx 10.4.11) where i'm using buffer & waveform to crop audio files. no big deal, right out of the help file. what's different is that i'm using sfinfo~ at the same time to give me bit channels/depth/sample rate info. then i'm using the file name out of sfinfo~ and [prepend replace] into the buffer~ to change audio files. on some audio files this works fine, on others i get an error message that says buffer~ can't open file. if i use [replace] directly into the buffer~ that file loads. if i try to send the message [replace audiofile], i get the error. any idea what i'm doing wrong? or what might be up with some of my audio files?