Problem syncing calendars: "iPhone disconnected" error message

Everything seems to work as expected except for calendars. Every time I sync, the progress bar in iTunes hangs on "syncing calendars" and eventually I get an error message that says "iTunes could not sync calendars to iPhone because the iPhone disconnected". All other items sync fine. Any advice?
15" MBP Mac OS X (10.4.10)

I am having the same problem since last software upgrade for itunes and iphone. Apple phone support had me try the following: 1. delete all calendar events with neverending dates. Didn't fix problem. 2. Reinstall software upgrades. Didn't fix problem. 3. Restore iphone to factory settins and delete all old "corrupted" calendar imports from old Palm calendar. This seemed to work for a day. Then I tried syncing tonight and got same error message. Any body able to help?

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Hi.
Are there any other suggestions to try and resolve the error message I keep getting; 'itunes won't backup iphone, iphone disconnected'
Have tried suggestions on forum i.e resetting isync, deleting recent installed apps, hard reset, reinstalled Itunes.
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'itunes won't backup iphone, iphone disconnected'
Just doublechecking. In the course of your troubleshooting to date, have you worked through the following document?
[iTunes: "Backup could not be saved on the computer" alert message|http://support.apple.com/kb/TS2529]

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I have just tried to sync my iphone.
Worryingly an error message saying it cannot be synced has popped up quoting error code (-50)
I have just removed old iphone backups from itunes but was very careful to not delete the current one
What does this code mean?

http://support.apple.com/kb/TS1583

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Many thanks.
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(If there's a SpeedBit LSP showing up in Autoruns, it's usually best to just uninstall your SpeedBit Video Accelerator.)

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I had an iPod Classic 5th Gen that I upgraded from 30gb to 80gb. The problem I'm having is that it will not sync more than about 5.4gb worth of songs. The iPod begins to freeze mid sync and the (-69) error message haults the sync process. The hard drive has been upgraded, it has a new logicboard (with 128mb RAM), new housing, battery, hold / headphone jack. Basically the only original parts are the bezel, click wheel, screen, and data ribbons. Have attempted the 3Rs and have also tried to isolate potentially corrupt audio files and remove them, but this did not seem to be the primary cause. The sync failure consistently happens at just under a 1000 songs (5.4gb) and then it starts to error (-69) any song after that. Your advise would be enthusiastically received.

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Hi man, I got the same problem with my iPhone, but it has been solved..
First, You need the Outlook 2003 or 2007 only, if you have a earlier version of this it isn't work.
Second, You sould need to create a new PST file whit the Outlook Version 2003 or 2007, the file format must be on Unicode Format, no Outlook (97-2000) format, with this file format the import of calendar doesn't gonna be work.
Third, You now have a PST whit Outlook 2003 or 2007 Version, you need to manually put your events on the calendar, Why? Cause if you just move it on the new calendar it gonna create and old instance of the event not a new instance, That's why iTunes doesn´t sync the calendar.
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Hey dylanburks12,
It sounds like you are seeing issues when attempting to sync videos to your iPod. I have an article that will help explain some possible situations regarding this issue:
iTunes: Videos may be unable to sync to iPhone, iPad, or iPod - Apple Support
http://support.apple.com/en-us/ts1497
Thanks for using the Apple Support Communities!
Cheers,
Braden

Problem syncing calendars.

I have a problem syncing calendars. When I sync my iphone with my home desktop computer, events will transfer from the computer to the phone but not vice-versa. The calendars are in Outlook 2010 and the operating system is Windows 7. All updates in place. I have changed the settings in itunes for all calendars to sync. I have also lost bits of data in contacts such as phone numbers and addresses, or it is possible that duplicates were deleted that contain the additional info. I suspect this is a different issue. I would appreciate any help.
Thanks,
E.L. DuBose

Try;
System Preferences> Mobile Me> Sync>Advanced>Reset Sync Data and make sure the arrows go from your device/computer to the cloud
Message was edited by: Bobsax

I keep getting an error message when I try to sync my new iPhone5s to iTunes. It says my computer is not authorised. When I authorise it and try and sync again, the same error message appears. help?

I keep getting an error message when I try to sync my new iPhone 5s to iTuines.
It says my computer is not authorised.
When I authorise it successfully, and try and sync again, the same error message appears.
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Hello Chad176
If you are constantly Authorizing your Apple ID, the article below will assist with getting that resolved for you.
iTunes repeatedly prompts to authorize computer to play iTunes Store purchases
http://support.apple.com/kb/TS1389
Thanks for using Apple Support Communities.
Regards,
-Norm G.

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Although you used the new USB 3.0 port, the actual connection speed is still USB2.0, as the iPod Dock connector, does not have the 10 times faster USB3.0 signal pins, the connection speed is still 480Mbits/s
I assumed that you have tried the other USB 2.0 port to no success..
Can you do the iPod Disk diagnostic as posted earlier by tt2, it wont fix your problem, but helps in troubleshooting.
Have a nice day!

Problem syncing calendars: "iPhone disconnected" error message

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