Previous 1 2 3 4 Next 121 Replies Latest reply: Jun 24, 2010 4:52 PM by Weverson Go to original post
  • dbarnett99 Level 1 Level 1 (0 points)
    It looks like have a similar issue. I just now updated to the latest version of iTunes + QuickTime. When I start my machine, I get a Visual C++ Runtime error but it doesn't show the program. In the Control Panel, when I click on MobileMe, I get the same error message:

    "Runtime Error! R6034. An application has made an attempt to load the C runtime library incorrectly. Please contact the application's support team for more information." When I click "OK" I get the following notification:

    "AppleSyncPref.exe - Application Error. The exception unknown software exception (0xc06d007e) occurred in the application at location 0x7c812afb."

    I was asked to reboot my computer after installing iTunes 9.1; when that happened, the error box froze my machine and I had to do a hard restart. I still get the runtime error message everytime I boot, but the screen is not frozen on subsequent reboots.

  • TXDane Level 1 Level 1 (0 points)
    I have received the same two errors re: MobileSync and Yahoo Go Sync Client. As this is my first day with the iPhone - VERY concerned that there will be continued software problems!
  • iSOFTLisa Level 1 Level 1 (0 points)
    The problem is not actually with the iPhone, it's with iTunes. I wouldn't be concerned about the iPhone. I've had mine for about 4 months and this is the first problem I've encountered.
  • hdcappie Level 1 Level 1 (0 points)
    I have the same problem when i updated iTunes i no longer could sync as error "mobile sync has stopped working".

    Frustrating please help!!!!!
  • hawkmoon2 Level 1 Level 1 (0 points)
    I've had same problem. Resolved it by uninstalling iTunes and installing previous version (got it from All working again. I won't update iTunes till I know the problem has been resolved.
    NOTE: You need to remove everthing that relates to iTunes and Quicktime from your computer before installing the older version. (but obviously NOT your iTunes Media folder). Hope this is of help.

    Message was edited by: hawkmoon2
  • craigy1978 Level 1 Level 1 (0 points)

    I'm having the very same problem with mobilesync since the update to iTunes 9.1. I thought it was something wrong with my laptop but obviously it isn't.

    When I sync my itunes to my iphone 3G S 32GB, everything sync except for my contacts, calander, notes, basically everything under the INFO tab does not sync.

    My music and photos sync and I don't have movies so can't confirm if that syncs or not.

    Has this issue been reported to Apple and if so, do we know if they are working on a fix update.

    I'm not that good with itunes, so how do i uninstall itunes 9.1 without deleting my itunes music folder as I don't want to go through having to re-install/copy or my music again. Any help will be appreciated.


  • TheRenix Level 1 Level 1 (0 points)
    Add another to the list. Everytime the iPhone 3gs 32Gb is plugged into the computer, ITunes seems to get through the backup but then windows throws the MobileSync has stopped working and yahoo go sync client has stopped working.

    I'm not going to go all "The thing is useless because of this!" on anyone because I haven't needed to sync anything important yet, but if it's not resolved before my next trip, you may find me less accommodating.

    Can someone from Apple advise if it's best to roll back to the previous iTunes or wait for a fix? 3 days later and no news... seems like someone should provide some guidance here.
  • peterdv Level 1 Level 1 (0 points)
    Reverting back to worked for me, too. I wasn't aware of Thanks, hawkmoon2.

    Note that if you've updated to 9.1, your "iTunes Library.itl" file will no longer work. You'll need to use a previous .itl file from the "Previous iTunes Libraries" directory.
  • craigy1978 Level 1 Level 1 (0 points)
    So it looks like it's best just to wait till Apple resolve the issue and release an iTunes 9.1.1 update or something to correct this issue that obviously everyone is having.

    The iTunes update was released for the new iPad, I wonder if the ipad syncs or has the same issue as the iPhone users are having.

    Come on Apple, you might release something new but don't mess iPhone users around. Seriously fix this issue asap or I tell u, updating to iPhone 4g won't be option to stay with apple.


  • carnivaljumbie Level 1 Level 1 (0 points)
    Add another. I am getting an error message:
    ITunes was unable to load dataclass information from Sync Services. Reconnect or try again later
  • Brodie17 Level 1 Level 1 (0 points)
    So I reverted back to and I'm still getting the same two errors.

    I uninstalled iTunes 9.1, and also Quicktime. I then removed the entire iTunes directory, and did a search to make sure there was no trace of iTunes or Quicktime. I then installed the two error still occur when trying to sync with Outlook.

    For those who successfully reverted, and got the sync to work I missing any steps? Did you have to wipe your iPhone before the sync? Am I missing any other files that I should be deleting?

    Any help would be appreciated...thanks!
  • riversen Level 3 Level 3 (675 points)
    Carnivaljumbie, that is my exact same error! I am so frustrated now.
  • ssanders79 Level 1 Level 1 (0 points)
    Same exact problem "mobilesync has stopped working" and then "yahoo go sync client has stopped working.

    My media will sync, but Contacts, calendar, notes from outlook and my favorites are not syncing. I am mostly concerned about my Calendar with contacts coming in at a close second.

    I am at the point were I am just going to wait until 9.1.1 to fix this issue.
  • ninja_pimp Level 1 Level 1 (15 points)
    itunes opens but it wont sync with anything. and it wont display my devices.
    it worked once. but after i rebooted my PC it simply wont see my iphone or my ipad anymore
  • apl92 Level 1 Level 1 (0 points)
    Same for me.
    I still have the 2 same errors after installing
    Even if I uncheck synchronize calendar and contacts
    I have the errors.

    Hope apple will correct quickly this error
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