HT203175 unable to load class information from sync services

I am unable to sync my ipod touch. I get the following error message: Unable to load class information from sync services. Reconnect or try again later. Any suggestions?

In the course of your troubleshooting to date, have you worked through the following document?
iTunes for Windows: "Unable to load data class" or "Unable to load provider data" sync services alert

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Do not seem to be able to backup iPad via iTunes on to my PC. Message after connecting is "iTunes was unable to load class information from Sync Services, Reconnect or try later" Have tried that but get the same result. Can anyone assist?

Do not seem to be able to backup iPad via iTunes on to my PC.
Message after connecting is "iTunes was unable to load class information from Sync Services, Reconnect or try later"
Have tried that but get the same result.
Remedies I've tried are:
wait and try again
reboot
reload iTunes
NB hp is a relatively new machine and has previously backed up quite happily.
Can anyone assist?

RHoodnkt-
Try rebooting the iPad. Hold down both the Home and Sleep buttons for several seconds until the Apple logo appears. Ignore the "Slide to power off" arrow. It takes a minute or two to restart.
Also be sure your iPad battery is not completely discharged.
Fred

I cant sync my iphone 5s on windows itunes, keep getting error message unable to load dataclass information from sync services.

i can not sync my iphone 5s on itunes on windows. keep getting error message "unable to load dataclass information from sync services" when plugging in my phone.
I have tried uninstalling itunes and re-installing it.
Turning off firewall and antivirus.
Has anyone had this before and if so how did you over come this issue?
Thanks in advance

Hey troyboi12345,
Thanks for using Apple Support Communities.
To troubleshoot this issue, follow this article.
iTunes for Windows: "Unable to load data class" or "Unable to load provider data" sync services alert
http://support.apple.com/kb/ts2690
Have a nice day,
Mario

When I connect my iTouch to my PC (windows 7) an error message is displayed reading "iTunes was unable to load dataclass information from sync services. Reconnect or try again later".

When I connect my iTouch to my PC (windows 7) an error message is displayed reading "iTunes was unable to load dataclass information from sync services. Reconnect or try again later". I have completely uninstalled and then reinstalled iTunes. I have also completely reset my iTouch to factory defaults. I have even followed all the advice provided previously to other forum member with the same problem. Nothing seems to work. Please help me someone.

I'm getting the same problem with both my IPad 4 and iPhone 5
Just started a few weeks back, Since then I have had two Itunes updates.
Is this something Apple is aware of and trying to fix?

ITunes was unable to load dataclass information from Sync Services

Hi,
I have Iphone 3GS with the latest version 3.1.3 and iTunes 9.1. After i uograded my iPhone to the latest version i am not able to sync with the iTunes and receive the message "iTunes was unable to load dataclass information from Sync Services, Reconnect or Try later". I am using Windows XP with Symantec Endpoint protection.
I have tried following steps to troubleshoot the problem but all my attempts have failed,
1. Uninstall iTunes by Removing, iTunes, QuickTime, BonJour, iPhone congiguration Utility and Bonjour. Remove all the iTunes and related folder from the C:/ drive
2. Restart the computer and intall the latest version of iTunes and Quicktime
3. Restore the iPhone to the factory settings using iTunes
4. Restart the system as well as hard Boot the iPhone (Hold Start and Wake/Sleep Button)before connecting again
5. Repeat the Steps 1 and 2 after restoring the iPhone
I am still getting the same error and now I can't even open the first page for iPhone in iTunes when I connect it to my computer. All my content is still in iTunes but everything is lost on the iPhone.
I searched the Apple support and they talk about problem with the Symantec Endpoint. I have the latest version of Symantec endpoint way above what is mentioned on the Apple support page.
Can someone please help me, it seems restore worked for most of the people facing this issue, but for me even restore is not working.
With Regards,
Ankur

I got a present of an itouch. This is my first time back to apple after 5 years. I cant get my itouch to sync due to dataclass error on Windows XP pro. I have installed the latest version of itunes 9.2.1.
WHAT IS THE POINT IN OWNING A DEVICE FOR PLAYING MUSIC WHEN YOU CANT LOAD THE MUSIC !!!!!
Does anyone have a solution or alternatively (shock horror) Apple could actually get its AR*E in gear and fix the problem. I would also suggest that Apple would post a friggen solution on its website, but no that may be too much to ask.
very frustrated. any help gratefully received otherwise the touch gets thrown out.
thanks

ITunes was unable to load dataclass information from Sync Services-Solution

Hello all. I recently upgraded to iTunes 9.1.1.12 on a laptop with Windows XP Pro and the latest iPhone OS (as of May 16,2010). Right after that, I started getting the "iTunes was unable to load dataclass information from Sync Services" error message. After I dismissed that window, it would go ahead and indicate that it was synching for a minute or two, and then indicate (in iTunes) that it was backing up the iPhone. This will run forever unless cancelled and the phone would not synch.
After reading various solutions that worked for others (install Mobile Me, reinstall itunes, run diagnostics, all with numerous reboots in between), this is what worked for me:
1) Open up Windows Services, and stop the Apple Mobile Device and iPod Service, and mark them as manual (as opposed to Automatic).
2) Deinstall iTunes
3) Delete the c:\program files\common files\apple folder (and all sub folders within). This is where the services are stored, and when I did all of these steps without doing this step, it didn't fix my problem. By deleting this folder, you insure that the iTunes install reinstalls these. You should see the services that were stopped in step 1, running again after the install is done. Note: I don't use Safari or QuickTime on my laptop, so I can't say whether or not this step would have any impact on those apps.
4) Reinstall iTunes.
5) Connect the iphone to your computer.
6) At this point, I still got the dataclass error, so I immediately cancelled the synch.
7) Run the diagnostics for the iphone (connectivity and synch).
8) At this point, two DOS windows launched, and I did get another error about being able connect to the synch server.
9) Closed the error message and disconnected the iphone (the phone at this point did not indicate that a synch was occurring).
10) Reconnected the iphone and, voila, it's been working fine ever since.
Hope this helps someone else out until Apple deals with the 9.1.1.12 (and .11) issues with synching.

Either do Windows Control Panel → Administrative Tools and then picking "Services" or typing "Services.msc" in the Run command on Start menu.

ITunes 9.1 was unable to load dataclass information from Sync Services.

Everything was working perfectly fine on 9.0, then i upgraded to 9.1 version and my iPod Touch 3G stopped syncing properly (error as in subject). I tried many things, checked dll's, restarted services, everything without success. SO...
I uninstalled every single apple program and couple non applce. Deleted every Apple related file, even all those hidden in users/common files/app data folders. Double checked everything and restarted PC. THEN I downloaded full version of iTunes 9.1 64bit and installed.
Aaaand I restarted everything, lunched iTunes, plugged iPod in. Some Apple drivers installed themselves, then iTunes was frozen for couple minutes. Finally iPod shown in iTunes. I tried to sync and... BAM. Still broken, still same error "iTunes 9.1 was unable to load dataclass information from Sync Services. Reconnect or try again later"
Please help, my iPod is useless. Can u release new, working iTunes?

OK i have to say, i finally fixed it. Now its fully working without ANY problems, here is what i did (before trying this u should probably do this http://support.apple.com/kb/HT1923):
1. Unplug every external Card Reader.
2. Unplug every Card Reader in your PC (they are plugged into motherboard)
3. Unplug every USB Hub.
4. Unplug every USB Drive or USB HDD.
5. Plug in Ipod Touch/iPhone.
6. Go to Device Manager.
7. Search for "USB Mass Storage Device" in Universal Serial Bus Controler.
8. Right click on it and UNINSTALL.
9. Search for "Scan for hardware changes", click on it and wait a bit.
10. Turn on iTunes and check if its working.
Now it should work like a charm.

ITunes 10.5.3, Unable to Load Class Data from Sync Services, Crashes Repeatedly

Ever since iTunes 10.5.3 on my Windows 7 x64 box, I've been having serious problems keeping iTunes running:
1) Any time I connect my iPhone or iPad, or any time they attempt to sync over WiFi, I get the 'Unable to load class data from sync services' error. It's worth mention that the iPhone or iPad do actually then proceed to sync correctly, and all media / data is synchronized successfully, as far as I've been able to tell. I've reset sync history, restored the iPhone and iPad, manually moved the SyncServices directory, set both the iPhone and iPad up as new, completely uninstalled iTunes and the mobile device software, re-installed, and *nothing* I do fixes this issue or even seems to impact it. Uninstalling iTunes 10.5.3 and reinstalling iTunes 10.5.2 resolves this error.
2) iTunes 10.5.3 has serious crashing problems on my machine, though I've searched through forums and found a lot of other people with the problem. In my case, sporadically as iTunes access the iTunes store (for example, I can always make it happen by subscribing to the Diggnation podcast and telling it to refresh the podcast), I get a full application crash which generates the following event in the event log:
Faulting application name: iTunes.exe, version: 10.5.3.3, time stamp: 0x4f14cc3d
Faulting module name: KERNELBASE.dll, version: 6.1.7601.17651, time stamp: 0x4e211319
Exception code: 0x80000003
Fault offset: 0x0001280c
Faulting process id: 0x564
Faulting application start time: 0x01cce78789dc009a
Faulting application path: D:\Program Files (x86)\iTunes\iTunes.exe
Faulting module path: C:\Windows\syswow64\KERNELBASE.dll
Report Id: ecc77400-537a-11e1-b809-00248c196007
Again, uninstalling iTunes 10.5.3 and re-installing iTunes 10.5.2 fixes this issue as well, but I really shouldn't have to do that. Is there any actual solution to these problems other than dowgrading to an older version?
Yes, I'm running current malware protection (and my system is clean) and yes, I've already checked any other obvious culprits to make sure I don't just have a corrupt library or file somewhere that's causing it. My Windows 7 install is completely up to date from a Windows Update perspective and also from a driver perspective (even including the motherboard and chipset drivers). I made sure to do a system file integrity check (sfc /scannow) and it confirmed my install of Windows isn't suspect, but beyond all that I was able to reproduce these failures on a completely separate machine running Windows 7 x64, without any of my media library or data on it -- iTunes 10.5.3 just seems to be bad news on Windows 7 x64 for me, even though I know there are definitely people are using it successfully. I don't get any other application crashes for any other applications, and I've never had an issue like this with any previous version of iTunes...
Last but not least, in case it matters, I'm running iOS 5.0.1 on both the iPhone4 and the iPad2. The iPhone4 is the GSM AT&T model and the iPad2 is the CDMA Verizon model.

OK, I've given up. Uninstalled iTunes 10.5.3 permanently. It's a shame, 10.5.2 works perfectly but 10.5.3 is a complete and total cluster for me.
Anyone with the same problems who hasn't done this already, just uninstall iTunes and the Apple Mobile Device Service in your Add/Remove Programs, then re-install iTunes 10.5.2. You won't lose your library or any settings or apps, it will just go back to working again.
I wish Apple would acknowledge this so that I'd at least know it would be fixed in the future.

"Unable to load dataclass information from Sync Services" Any ideas?

I upgraded to iTunes 7.7 last night and now I get an annoying constant stream of errors that read "AppleMobileDeviceHelper has stopped working". Multiple reinstalls have not stopped it.
Against my better judgement, I upgraded my phone to 2.0. Found out that I lost everything on my phone. It is activated and will work but I cannot sync it with iTunes. All I get is a message stating, "iTunes was unable to load dataclass information from Sync Services. Reconnect or try again later."
iTunes won't recognize my phone. I can move songs and stuff to it by drop and drag but if I click the "iPhone" in iTunes, nothing happens. I put my phone in recovery mode. iTunes linked to it and reinstalled 2.0 but I still get the same problem.
I'm real frustrated and Apple has not posted anything about this problem.
Does anyone have any ideas on what is the going on? Is my phone nerfed?

Try disabling your firewall, virus SW, and if it still won't sync, I would try disabling the communications services one by one until it clears. When I'm troubleshooting this sort of problem, I first look into the system reports (MY Computer, (right-click) manage, event viewer, Windows Logs, and look into each of the sub log sections for the error. This will often point you in the right direction. If this fails, I do a clean boot with all extraneous run-times and services disabled. usually the problem will be solved. I then start turning on the various run-time routines and services until I find the culprit.
My attitude about this is that I won't waste my time chasing problems like this unless they are critical. Paying $$$ for a 3G iPhone and then having to troubleshoot the SW is not my cup of tea. I only pursued this because my wife and both kids got 3G's but I have them running both XP and Vista. One Vista machine synced OK, but mine would not. Intellectual curiosity led to find out why.
Lysimakus

Unable to load dataclass information from sync services and appcrash????

i have an asus u50f seris notebook with windows 7 64 bit operating system as soon as i plug my ipod in i get a message saying mobiledevicehelper has stopped working. under detail the problem event name:APPCRASH application name:Applemobiledevicehelper.exe appers over and over as long as the ipod stays connected then itunes displays a message saying itunes was unable to load dataclass information from sync services reconect or try agian later. i have tried my ipod on a different computer works fine . why wont it work on mine my computer is only a couple months old.

try if any of the suggestions in this thread help.
sometimes it helps to restart the "Apple Mobile Device Service". click here and follow the instructions.
JGG

... unable to load dataclass information from Sync Services = Iphone Sync

" Itunes was unable to load dataclass information from Sync Services. Reconnect or try again later. " - this is the message I receive after Iphone is plugged in. Itunes is 7.7 and Iphone is 2.0 at this point, only started happening after the updates of both.
On a separate note, this same Itunes does not recognize Outlook as an option to sync from and all attempts to press Configure button yield zero result. I have a hunch that tells me the two are related ) . If any of you have had that problem, please post. The search turned up zero related posts.
Cheers.

I'm getting the same thing. I came into the office all excited to get the 2.0 update, ran the update and now my phone is stuck on the "slide for emergency" USB/Globe screen.
When I try and load itunes and connect to the phone I get the same "itunes was unable to load dataclass information from Sync Services. Reconnect or try again later."
I've reconnected and waited and still no luck.
here's the sequence, when opening itunes with the phone connected:
Open iTunes, it waits for a while trying to connect to the iTunes store, then it comes back and says "We could not complete your iTunes Store request. The network connection has timed out."
I know my network connection is fine. The iTunes diagnostic even says so.
I click Ok there and get the iPhone listed in the left index thing, but all I get in the body is a big "iPhone"
Then it gives another "Accessing iTunes Store" status and the same "we could not complete..."
help, please?

ITunes was unable to load dataclass information from Sync Services. Reconne

I'm getting the following error on iTunes 8 when quitting:
"iTunes was unable to load dataclass information from Sync Services. Reconnect or try again later."
Anyone else seeing this?
Don

I started getting the annoying “iTunes was unable to load dataclass information from Sync Services. Reconnect or try again later.” error when i installed iPhone 3.0 beta onto my 1G iPhone. I have uninstalled iTunes (version 8.1), uninstalled Apple’s Mobile Device Support and reinstalled both of them but that did not fix the problem. I have also installed an older version of iTunes but that did not help as well. The error is not just annoying, i was not able to restore from my iPhone backups. I made a mistake in getting iPhone 3.0 beta onto my iPhone and instead of “update”, i chose “restore”. That wiped out all the App Store applications that i had installed. I could easily re-install the applications but there was no way for me to restore the saved data for some of the apps like eWallet and Gas Cubby. Until iPhone 3.0 beta is jailbroken, restoring a backup is the only way that i am aware of that can restore the app data.
From the Console log, i noticed these errors were generated whenever an iPhone is connected to my Mac Pro:
3/19/09 10:57:50 PM [0x0-0x17a17a].com.apple.iTunes[4049] MobileDevice: readcallback: Could not receive message
3/19/09 10:58:02 PM [0x0-0x11011].com.apple.systemuiserver[233] DigiHub:sendChargingCommandToDevice RequestExtraPower(kUSBPowerDuringWake) returned 0
3/19/09 10:58:02 PM [0x0-0x11011].com.apple.systemuiserver[233] DigiHub:sendChargingCommandToDevice sending command with sleep: 0, wake 0
3/19/09 10:58:02 PM [0x0-0x11011].com.apple.systemuiserver[233] DigiHub:sendChargingCommandToDevice sending command with sleep: 0, wake 0
3/19/09 10:58:05 PM [0x0-0x17a17a].com.apple.iTunes[4049] Parent: Can't write length for data
3/19/09 10:58:05 PM [0x0-0x17a17a].com.apple.iTunes[4049] Parent: write to child failed, trying to create child again...
3/19/09 10:58:05 PM [0x0-0x17a17a].com.apple.iTunes[4049] Exec of child with pid 4100 failed with error 255
3/19/09 10:58:05 PM [0x0-0x17a17a].com.apple.iTunes[4049] Exec for child /System/Library/PrivateFrameworks/MobileDevice.framework/Versions/Current/Apple MobileDeviceHelper.app/Contents/MacOS/AppleMobileDeviceHelper failed or inexplicably returned
3/19/09 10:58:05 PM [0x0-0x17a17a].com.apple.iTunes[4049] Parent: Can't write length for data
3/19/09 10:58:05 PM [0x0-0x17a17a].com.apple.iTunes[4049] Parent: Can't talk to child
So i decided to get rid of everything in /System/Library/PrivateFrameworks/MobileDevice.framework and re-installed Apple Mobile Device Support. Voila, that worked!

Help! "iTunes was unable to load dataclass information from Sync Services."

Help! what to do? When you connect iphone, the program writes this message "iTunes was unable to load dataclass information from Sync Services."

It could be possible the service is disables. Go into control panel of your pc, into administrative services, then click in services. There you will see a list of services. Find the apple and itunes services. See if they say disabled. If they do, right click on it, then another dialogue pops up. It will stay stopped. Scroll in there and put automatic. Then hit apply. Then click on start. It will then apply the service and you should be able to connect your ipod.
Have you registered this other ipod for iTunes on your pc?

When trying to sync my I Phone 4 to I tunes I am getting a message: Unable to Data class information from Sync Services. What does this mean?

When I-tunes is trying to sync my phone, I get a message regarding Data Class Information from Sync Services saying they were unable to do this. I have no idea what this means. I have not been having any problems with syncing info from my computer to phone until just now. I am trying to install new alert tones from an app that I purchased. The alert ones are now in my library on I-tunes and they play but they are not syncing to my phone. The snycing options is not available in my library and when I try to manually sync these tones, nothing is happening. I recently purhcased ringtones from the I-tunes store and from my phone and they downloaded with no problems and are synced onto my computer and are showing up in the same library list as the tone alerts which I cannot seem to sync. I have no idea why this is. Please help!

In the course of your troubleshooting to date, have you worked through the following document?
iTunes for Windows: "Unable to load data class" or "Unable to load provider data" sync services alert

After clicking sync, window shows itunes unable toload data class information from sync services. can you help

I hook up my ipod touch and choose to sync. then i get a message "itunes unable to load data class information from sync services.

See here: iTunes for Windows: "Unable to load data class" or "Unable to load provider data" sync services alert
B-rock

HT203175 unable to load class information from sync services

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