boolean isPlaying()

Hi

I probably asked this in the wrong department. I have a sketch written in 1.5.1 which worked and is now not working and I am not sure why it is hanging up on boolean isPlaying(){ return playing; } it is hanging up on 'playing' cannot find anything named playing not sure why......... can anyone help? just downloaded processing 1.5.1 (thought it best to stick to original version) on mac mini running 10.9.4 2.3GHZ Intel Core 17 processor and 4GB 1600MHz DDR3 memory

I can send all the code along if it helps?

Thanks