Need some help  

My standalone Sony Blu-Ray Player won't play a DVD+R I recorded. It has never had this problem before and I have since realized the problem is I forgot to finalize the DVD+R when I recorded it. None of my other standalone players (another Blu-Ray player on my laptop and various DVD players on computers) will play the DVD+R disk either. I recorded the DVD+R earlier today at a local university using one of their machines. Does anyone know whether I can go back tomorrow and still finalize the DVD+R so that the content is preserved (not erased) and recognizable and playable on other players? I know the DVD+R disk will play on the university's player but I need to be able to play this disk on other players as well.

Thanks, you were correct. Went back and used the same machine to finalize and now the disc plays on my Blu-Ray Players and other playback devices.