Tonight I felt like renting the new Star Trek movie in iTunes. I'd heard really good things about it and had wanted to rent it for some time. My wonderful wife bought me an iTunes gift card for Christmas so I wanted to start putting it to good use. The nearly 4GB download finally finished (HD rental) and I was ready to start the movie. After clicking play I received a dialog box with error code 5103. I ran Software Update to make sure I had the latest version of iTunes hoping that it would be a simple fix. That didn't do it. After some digging I got it going and now I'm sitting here enjoying this action-packed opening sequence. Here's what I found:
Initially I thought it might be related to my date/time settings based on this Apple Discussions thread. I thought that was odd considering I was playing this on an iMac that is 2 days old. I looked around some more and found an Apple Support page giving some instructions for fixing the error. After deleting the /Users/Shared/SC Info/ directory and re-opening iTunes the rental played perfectly. I was quite nervous at first because reading the support page suggested that I would have to re-download the nearly 4GB rental. Thankfully I didn't have to re-download it or re-authorize iTunes. After deleting the directory it worked like a charm.
Perhaps someone will come across this entry one day and have their problem solved 
Comments
Yeah there are a number of films I’d love to see in the theater. Unfortunately it cost an arm and a leg to go on a movie date these days. I just wait for rentals now. I probably go to the movies once a quarter now.
Me too… if I see a movie it’s usually with my friends because then we dont’ have to pay for a sitter.
Worked like a charm, I actually could not complete the download of 2 rentals without getting the 5103 error…...in my case I had 2 instances of /users/shared/sc info file, there was an sc info file ~ orig. Once I deleted these they completed downloading in about 2 seconds. Thanks!
That’s great DS, glad this helped you out. I’m sure you were as relieved as I was once the downloads worked
Your Words of Wisdom
You should’ve seen it in the theatre. I did and bought the DVD last week.
Sean on Jan 5th at 8:08 pm