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iTunes 7.7 unable to locate dataclass information from Sync Services

2153 Views 12 Replies Latest reply: Jul 21, 2008 12:42 PM by jtd18 RSS
jtd18 Level 1 Level 1 (5 points)
Currently Being Moderated
Jul 17, 2008 9:34 AM
Upon upgrading to iTunes 7.7 and connecting my iPod touch, I began receiving the following error message: "iTunes was unable to locate dataclass information from Sync Services. Reconnect or try again later."

I followed the steps listed in these articles:
http://discussions.apple.com/ann.jspa?annID=640
http://docs.info.apple.com/article.html?artnum=305415

I am still experiencing this issue. Are there other suggestions I can attempt? I've tried to locate other posts on this topic but it's difficult since the "Discussion Search" box is missing. Thanks! JD
HP Pavilion dv6000t, Windows Vista, Media Center Edition
  • CasperGemini Level 5 Level 5 (4,305 points)
    Give this a shot:

    Go into Control Panel > Programs & Features
    Remove these applications:
    1. Apple Software Update
    2. Apple Mobile Device Support
    3. Bonjour
    4. iTunes
    5. QuickTime

    Restart the computer
    Download & Install the Windows Installer Cleanup Utility:
    http://support.microsoft.com/kb/290301/
    Launch the Utility: Start > Programs > Windows Install Clean Up
    Select any of the above mentioned applications, and click Remove

    Restart the computer again
    Download & install iTunes again from here: http://www.apple.com/itunes/download/
    Choose the option to "save" the download and save it to your desktop
    When the download completes, if it asks you if you want to run the software, say no
    Right-click on the iTunes Setup file on your desktop and choose Run as Administrator

    CG
     Black MacBook 2.16GHz/2GB/160 GB HDD , Mac OS X (10.5.4),  80GB Black iPod Video * Orange iPod Shuffle 
  • CasperGemini Level 5 Level 5 (4,305 points)
    So far, you're right on with the steps. It's a good sign if none of the software is listed in the cleanup utility; that generally means it was appropriately removed with the previous step(s). This utility is mainly for some stubborn or damaged programs that won't uninstall via Programs & Features.

    I haven't yet seen a definitive fix for this; different options are working for different people.


    Some other suggestions:

    -Reinstalling the iPod driver
    Connect the iPod
    Click Start, right-click My Computer and click Manage
    Select Device Manager in the left-hand column
    Scroll down to Universal Serial Bus controllers in the right-hand column
    Click the + next to it to expand it
    Right click on the Apple Mobile Device and click Uninstall
    Restart the PC with the iPod connected

    -Working out a syncing conflict
    Do you have other devices that you sync to your computer? Either way, try this:
    Close iTunes and disconnect your iPod
    Click Start, right-click My Computer and click Manage
    Select Services in the left-hand column
    Scroll down to Windows Mobile Service, right click it and click "disable"
    If disable is not an option choose Stop
    Open iTunes and connect the iPod

    -Disable any and all firewalls
    This may result if the Outlook Sync Server service is blocked
    If this resolves the issue, look into configuring that firewall to specifically allow this service.


    Keep us posted on what (if anything) works for you
    CG
     Black MacBook 2.16GHz/2GB/160 GB HDD , Mac OS X (10.5.4),  80GB Black iPod Video * Orange iPod Shuffle 
  • CasperGemini Level 5 Level 5 (4,305 points)
    jtd18 wrote:
    In regards to "Reinstalling the iPod driver," the Apple Mobile Device was not listed in my Universal Serial Bus controllers.


    Was your iPod connected to your PC at the time? Make sure the iPod is connected, and displaying the screen that says "Connected, Eject before disconnecting." Try disconnecting and reconnecting the iPod if you're not seeing that while it's connected.

    In regards to "Working out a syncing conflict," the Windows Mobile Service was not listed in my Services.


    I'm thinking that might be because there aren't other devices syncing to your PC. Correct me if I am wrong. Did you have any success disabling firewalls?

    Also, I'm wondering if you've tried resetting the sync history.
    In iTunes, click Edit and go to Preferences
    Select the Syncing tab
    Click the Reset Sync History button and click OK
    See if the error continues.

    CG
     Black MacBook 2.16GHz/2GB/160 GB HDD , Mac OS X (10.5.4),  80GB Black iPod Video * Orange iPod Shuffle 
  • CasperGemini Level 5 Level 5 (4,305 points)
    I've seen this reported on some other threads, really not a lot of good information on them. One post mentioned the author had spoken with Apple's technical support and they indicated it was related to an overloaded iTunes server, due to the new software and app store and whatnot, but I would think that most of that overload has been eased by now. And I'm not 100% convinced on that answer anyway.

    CG

    Message was edited by: CasperGemini (typos, yikes)
     Black MacBook 2.16GHz/2GB/160 GB HDD , Mac OS X (10.5.4),  80GB Black iPod Video * Orange iPod Shuffle 
  • CasperGemini Level 5 Level 5 (4,305 points)
    These are the latest two suggestions dug up from some other boards:

    Restart the Apple Mobile Device service:
    http://support.apple.com/kb/TS1567

    Uninstall Microsoft Sync Center, if you have it installed.

    I'm not sure I'm leaning so much toward it being a Microsoft issue, because there's nothing even remotely close to this error on Microsoft's knowledge base.

    CG
     Black MacBook 2.16GHz/2GB/160 GB HDD , Mac OS X (10.5.4),  80GB Black iPod Video * Orange iPod Shuffle 
  • CasperGemini Level 5 Level 5 (4,305 points)
    Let's try testing this in a new user account.

    1. Go to Control Panel > User Accounts
    2. Click on "Manage Another Account"
    3. Click on "Create new user"
    4. Follow the prompts to create a new computer administrator
    5. Restart the PC and log in to the new account

    See if you can connect the iPod and make the same error appear. Regardless of the outcome of this test, I'm thinking we should go back to the first link of your first post and contact Apple Care regarding this. There must be a good reason for them to request users with this issue contact Support... perhaps they need information in order to determine the best course of action.

    http://www.apple.com/support/contact/

    CG

    PS. If you do contact a representative and come up with a solution, I'd be interested in hearing what comes of it.
     Black MacBook 2.16GHz/2GB/160 GB HDD , Mac OS X (10.5.4),  80GB Black iPod Video * Orange iPod Shuffle 

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