iTunes error when iPhone is connected
I am having problem with the iTunes (8.1) on my Mac Pro. Every time an iPhone (original or 3G) is connected, i will see this message:
+iTunes was unable to load dataclass information from+
+Sync Services. Reconnect or try again later.+
On Console, i see these messages:
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
When i click OK to get by the message, i am able to see my iPhone and it appears that i can synchronize with it. However, one thing that i have noticed is that the backup is failing. In the ~/Library/Application Support/MobileSync/Backup folder, there are several folders that are named using the UDID of my iPhone. If i delete all the folders, and i force iTunes to perform a backup, it should recreate a folder using my iphone's UDID as its name and it should populate the folder with backup information from my iphone, with files ending with .mdbackup, .mddata and .mdinfo. However, when i force a backup in iTunes, only the folder and a file called Info.plist is created. I do not see a Manifest.plist, Status.plist or any of the .mdbackup, .mddata,. mdinfo files. The Console log generates similar error messages as shown above when i tried to backup my iPhone.
These are what i have tried unsuccessfully so far:
- Uninstall iTunes, clean up all iTunes related preferences file, /System/Library/Extensions/AppleMobileDevice.kext and /Library/Receipts/AppleMobileDeviceSupport.pkg.
- Restart Mac Pro
- Reinstall iTunes (8.1)
Anyone else experienced this problem ?
+iTunes was unable to load dataclass information from+
+Sync Services. Reconnect or try again later.+
On Console, i see these messages:
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
When i click OK to get by the message, i am able to see my iPhone and it appears that i can synchronize with it. However, one thing that i have noticed is that the backup is failing. In the ~/Library/Application Support/MobileSync/Backup folder, there are several folders that are named using the UDID of my iPhone. If i delete all the folders, and i force iTunes to perform a backup, it should recreate a folder using my iphone's UDID as its name and it should populate the folder with backup information from my iphone, with files ending with .mdbackup, .mddata and .mdinfo. However, when i force a backup in iTunes, only the folder and a file called Info.plist is created. I do not see a Manifest.plist, Status.plist or any of the .mdbackup, .mddata,. mdinfo files. The Console log generates similar error messages as shown above when i tried to backup my iPhone.
These are what i have tried unsuccessfully so far:
- Uninstall iTunes, clean up all iTunes related preferences file, /System/Library/Extensions/AppleMobileDevice.kext and /Library/Receipts/AppleMobileDeviceSupport.pkg.
- Restart Mac Pro
- Reinstall iTunes (8.1)
Anyone else experienced this problem ?
Mac Pro (early 2008), 2 Quad-core 2.8 GHz, Mac OS X (10.5.6), 6 GB RAM, ACD 23"
