Product and version :
FMP Advanced 184.108.40.206
iMac, 27-in. (Late 2012)
When the AV Player tries to play an audio file (.mp3, .m4a) that contains a hash mark ("#") in the song title (e.g., "Symphony #9"), it produces an error and will not play the audio.
How to replicate
Use the "Content Management" sample solution. Add an audio file containing a hash mark ("#") in the song title. Set the file container field to be an interactive container. Try to play the file. This should produce the error.