Sometimes when i do file- export-audio, with the track or tracks selected, source set to entire mix, channel format stereo, file type wave, sample rate usually 48, bit depth usually 24, no dithering, all mix enables checked but audible bounce and live input unchecked ... then the exported file i get is called file or sometimes 4 file type and wont even open. Then if i dont change anything at all and do another export exactly the same without changing anything most times the next export will be a