User profile for user: nofary1987
nofary1987 Author
User level: Level 1
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sync server error and moblie device error. help

hi,
while im connecting my iphone to my computer, i receive 2 system error messages in itunes (im using itunes 10.1.1.4 on windows XP) :
1. syncserver error (SyncServer has encountered a problem and needs to close)
2. mobileDeviceHelper error
after this 2 errors there is another error from itunes:
"itunes was unable to load data class information from sync services. reconect or try later".

when im syncing any file to my iphone , i recive all the error again and again (maybe 10 error one after another) and after all i recive one new error:
itunes could not back up the iphone because the backup session failed.
despite all the errors, the files are sync to my iphone.
i tried to uninstalled, and to install older version of itunes but nothing help.
any idea or solutions?
thanks

Posted on Jan 20, 2011 3:55 PM

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20 replies
User profile for user: b noir
b noir
User level: Level 9
72,336 points

Jan 21, 2011 1:16 PM in response to nofary1987

Interesting. If we take the additional information at face value, we're having trouble with Apple Application Support. (Apple Mobile Device Support as well as iTunes requires a properly functioning AAS in order to work correctly.)

Doublechecking ... when you uninstalled and reinstalled iTunes, did you do a complete uninstall of the related software as well, as per the following document?

[Removing and Reinstalling iTunes, QuickTime, and other software components for Windows XP|http://support.apple.com/kb/HT1925]
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User profile for user: b noir
b noir
User level: Level 9
72,336 points

Jan 22, 2011 1:10 PM in response to nofary1987

what is AAS?


Apple Application Support. (That's where the relevant corefoundation.dll is stored nowadays.)

So if it isn't an Apple Application Support issue, then the next thing I'd check on is security software interference.

What make and version of security software (Firewall, antivirus, antispyware) are you running on the PC?
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User profile for user: b noir
b noir
User level: Level 9
72,336 points

Jan 23, 2011 2:24 PM in response to nofary1987

symantec 2005 antivirus


2005? ... okay, old versions of symantec security products have been implicated in this sort of thing before, as per:

[iTunes for Windows: "Unable to load data class information from sync services" alert|http://support.apple.com/kb/TS2690]

... but Bricopacks (also as per that document) have also been known to cause the issue on XP machines. So, if you update to a newer antivirus and/or uninstall your Bricopack, does that get you past the errors?
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User profile for user: Bauer192
Bauer192
User level: Level 1
0 points

Jan 24, 2011 7:42 AM in response to nofary1987

b noir, I didn't want to hijack the thread before, but since nofary's problem is solved (congrats!) I was hoping maybe you could help me out too. I got the same errors, but I have ESET NOD32 antivirus (v4) and Windows firewall.
I tried running iTunes with my iPod Touch connected after disabling both my antivirus and Firewall, but the errors still popped up. And I don't really want to uninstall NOD32... It protects me. :P

Thanks in advance! I really appreciate it.
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User profile for user: b noir
b noir
User level: Level 9
72,336 points

Jan 24, 2011 2:16 PM in response to Bauer192

b noir, I didn't want to hijack the thread before, but since nofary's problem is solved (congrats!) I was hoping maybe you could help me out too. I got the same errors,


Doublechecking before proceeding ... could you describe your own errors explicitly, please? (Slight differences in the details can sometimes indicate there's quite a different underlying cause involved with a similar-looking problem.)
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User profile for user: Bauer192
Bauer192
User level: Level 1
0 points

Jan 25, 2011 5:20 AM in response to b noir

*SyncServer has encountered a problem and needs to close. We are sorry for the inconvenience.*
AppName: syncserver.exe AppVer: 17.641.13.22 ModName: corefoundation.dll
ModVer: 1.550.36.0 Offset: 00043e08

*MobileDeviceHelper has encountered a problem and needs to close. We are sorry for the inconvenience.*
AppName: applemobiledevicehelper.exe AppVer: 17.793.0.136 ModName: corefoundation.dll
ModVer: 1.550.36.0 Offset: 00043e08

And then I get an error alert (big red X) from iTunes saying:
"iTunes was unable to load data class information from Sync Services. Reconnect or try again later."

Thanks 🙂
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sync server error and moblie device error. help

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