iTunes Error 42408 After 9.03 Upgrade

@Roy

Your first suggestion cleared the problem up for me. Thank you very much!

ae_8691 wrote:
I had the same problem. Check the version of iTunes via the About dialog. Mine said 9.0.2 despite having upgraded via system updates, itunes and even downloading the whole package again.

Turns out, the dock iTunes link is running the old one. Basically, remove it from the dock, and re-drag the itunes from the applications folder back onto the dock. This then started 9.0.3 for me, and my iTunes account worked, the itunes store worked and iphone sync worked as well. Phew.

Check the bottom of this page for my reference http://support.apple.com/kb/HT2311

Thanks so much - that worked for me.

Thanks so much!
This worked right away for me!

Problem is, to do anything, i.e., close iTunes, I have to click on "Cancel" or "Don't Authorize" from the popup window (since I've already tried "Authorize" about a thousand times and it didn't work). I'm afraid if I do that I'll lose access to the downloaded songs it says will be deleted from my iPod.

I just noticed that I get the same error message when I try to download music from iTunes - same error message "An Unknown Error Occurred," it can't be completed right now. This can't be good for Apple. Aren't they going to fix this problem?

Tried all these "fixes". Problem persists.

Weirdly, it only applies to apparently random tracks from among the many that I have purchased from itunes. Of two different tracks purchased in a single transaction, one works, the other doesn't.

Have emailed Apple/iTunes about it.

How hard can it be to debug these updates before imposing them on millions of users?

Hey, this worked for me, too!

I wish this solution had been easier to find.

Sorry, I need to clarify. The solution for me was to remove the iTunes icon from the dock, and then open Applications and drag the icon back to the dock. I then opened iTunes and was able to authorize my computer again. Don't know why it works, but it did for me.
Hope this gets fixed soon.

Hi Roy,

Just to let you know your second solution has resolved my problem.Thanks.

I went one step further...

I was about to follow Roy's procedure for removing the SC Info folder as described in section of this Knowledge Base document: http://support.apple.com/kb/TS1389

In this section you are supposed to delete the SC Info folder located in the following location:
C:\Documents and Settings\All Users\Application Data\Apple Computer\iTunes\

This is when it occurred to me that I don't have a "All Users" folder but instead "All Users.WINDOWS". I then created a "All Users" folder and rebuilt a similar directory structure and copy the content from SC Info folder to the new folder. Restarted iTunes and it worked just fine.

Deleting the SC Info file did nothing.
However, trashing the com.apple.iPod.plist in ~/Library/Preferences - and deleting the icon from the dock - got rid of the annoying error.
The obvious question is why the heck was it ever released like this?

My computer started giving me the same error last night when I updated to 9.03. I followed the suggestion to delete the icon and replace it with the icon from the App folder. (I did this). Then I deauthorized and reauthorized the computer. (This worked). Then I sync'd my ipod. (Now, this worked too). Went to bed. Woke up this morning and cold booted my iMac (with the ipod already plugges in). Guess what. I started getting the same 42408 error message all over again. Has this happened to anyone and if so, do you have any suggestions on what to do to fix it?

Thanks!

Update: I redeleted the icon and re-replaced it with the icon from the App folder. Deauthorized and then reauthorized the computer. Works fine. Syncs fine. Unplugged the ipod. Cold booted. iTunes and the ipod sync worked fine. Left the ipod plugged in and rebooted. Then, I got the same error message again when I rebooted it. Looks like you can't leave you ipod plugged in when you reboot the computer. Anyone have a similar experience?

I too am getting error code 42408. Tried deauthorizing then authorizing and neither worked.

Hey folks, was receiving the same error and fixed it. I simply deleted the itunes icon from desktop, went into itunes folder found itunes app file, and made a new shortcut on desktop which fixed the problem. I had tried all the other recommendations, but to no avail. Im not sure how macs address icons on the i guess desktop, but for windows users this fixed the problem.