What is "unknown error -50"?

I deleted iTunes and a bunch of other iTunes related files and downloaded the latest version and now it works (if you saw my previous post) but now it says "The iTunes Library file cannot be saved. An unknown error occured (-50)." I could just say "Do Not Warn Me Again" but I worry that that will delete my whole library or something if I ignore it long enough. Any guesses as to what I should do? I have a feeling I deleted an important file or something...

redgirl, I had the same error message when trying to sync and backup my iphone. I called apple support and they suggested I turn off my computer and my iphone, restart both, and give it another try. It worked. When I restarted my iMac, the only program I had running was iTunes. It's possible that I had too many programs open before and I just didn't have enough memory or something to do the sync/backup. Who knows. The rep at Apple said he just got off the phone with another user who had the same problem as I did and the "shutdown/restart" option worked for that caller too. Hope this helps.

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    I am getting this error, and not finding out how to resolve it, I have done the restor a bunch of times and restarted my computer etc etc.
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  • HT201210 What is Unknown error 2001, iPhone could not be restored.

    These error message is not listed in common issues for iPhone 4 trouble shooting. Does any one knows what is about, or any approach to solve this matter?

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