FLStudio (voice). I am using the LAME version linked to on Audacity's website, 3.99.3 or something. Quite often the time line does not show the "waveform" (or whatever the term is) just a very small little ...
FL will render a file, and this file won't open whatsoever. Even the icon that appears next to a file is blank when viewed in Libraries. The other 20% of the time, FL will do what it needs to do and render ...