Duplicate calendar items

all of a sudden (probably after this latest release), i am getting duplicate calendar items in my iphone on certain events. from what i can tell, if i create an event in ical and sync the iphone, the event is put on the phone correctly. if i then edit the event in ical and re-sync, it puts a duplicate event with the new information on the iphone, instead of just updating the event. it's highly annoying and i don't remember it ever being like this. anyone know how to fix this??

I had this problem months ago on my iPod Touch (roughly when this dormant thread was started, before the 2.0 update, I think). With that update, it went away, but has recently resurfaced, perhaps with the 2.1 update or perhaps since then. I didn't notice the resurfacing of the problem until this morning, but that doesn't necessarily mean anything.
The symptoms: When I create a calendar event in iCal, it syncs properly to my iPod. When I create a calendar event on the iPod, it does not sync to iCal. When I modify or delete an iCal-created event on my iPod, the event is not modified in iCal, and the original event is copied from iCal to the iPod, so I wind up with duplicate events (or the deleted event reappears).
This morning, I overwrote all calendar data on my iPod, to no avail. When I first had the problem months ago, I reset the sync history and then reset the whole iPod, also to no avail; I haven't tried those more drastic steps recently.
Is anyone else still/again having similar problems? Any solutions besides telling Apple and waiting for a fix?

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Duplicate calendar items iOS 5

After upgrading my iPod Touch 4G to iOS 5, I now have two entries for EVERY SINGE calendar item.
I'm syncing calendar items with Outlook 2010 (Outlook 2010 does NOT have duplicate entries, just the iPod Touch).
HELP!
--Owen

Try this!
Step 1:
In iTunes... Select your device > Go to the info tab > Uncheck Sync Calendars, contacts and anything else you have synced to iCloud.
*There is small print that will tell you having your device synced to both iTunes and the cloud results in duplicate info, it's small so it's easy to miss.
Step two:
iCloud.com > sign in/set up profile > select the calendars button > Look to the left, you should see a list of all your calendars > Edit (top right corner of the calendars list) and delete the duplicates you find.
This should work for you, let me know if you have any more trouble.
-Eden

Duplicates & triplicate Calendar items on my ipad after using the iCloud..

i have duplicates Calendar items on my ipad after using the iCloud.. what am i doing wrong?? and how do i fix it?

This solved my triplicate calendar issue:
(short version)
Settings ==> iCloud. Turn off Calenders.
Delete exisiting calendar information when prompted.
Settings ==> iCloud. Turn on Calenders.
Restart Calender App.
(verbose version)
On your iOS devices go to Settings App ==> iCloud. Turn OFF Calendar Syncing. It will ask if you want to keep or delete previous Calendars on your phone, Choose Delete. Restart your Calendar app and see if it's squeaky clean. I had just birthdays and anniverseries. If you are still seeing items other than those (like birthdays) generated by the device then you are bringing in calendars from multiple sources. You'll need to turn off the other sources (if you have their entries duplicated already in the cloud).
Now go back to Settings ==> iCloud and turn the calender back on. Restart the Calendar app, everything should look good now.

Duplicate Outlook Calendar items on my iPad2-PINK & BLUE!

After I connected to iCloud I got duplicate calendar items - just on my iPad2, not on my PC's Outlook (2010). I now have Pink and Blue duplicate calendar items... Very pretty - but annoying. I see that Pink means from my pc - meaning before using iCloud, and blue meaning iCloud calendar and calendar items entered on the iPad2. Why do I get both? And who do items entered on the iPad2 NOT get synced over to Outlook? This kind of defeats the idea of syncing, if it doesn't go both ways, and it duplicates things.
Any ideas?
Thanks,
Larry

I found the answer.
1. plug the phone in to your computer or wall plug or this does not work!
2. Go to settings>Icloud> and turn off calander sync. Then delete all items. Now your iphone calendar should be blank.
3. Now got to Icloud.com and log in using apple ID.
4. Look at your calendar. On the left edit your calendars and remove all of them. Now your cloud calendar should be blank.
5. Now go back to your Iphone cloud setting and turn calandar sync on. After awhile your Iphone calander should match your Outlook calnder and your Icloud calander should too.

Duplicate Outlook Calendar Items after upgrade to os5

Hi,
   I upgraded to os 5 the other day on my Iphone 4. I have an MSN email account with an MSN calendar. I have a lot of daily calendar items which are like reminders. I usually delete that days recurring reminder each day or 2 to keep a clean calendar. After I upgraded I switched to the Cloud. After that sync, I have duplicate calendar items for EVERY item on my calendar back years ago. This includes both onetime items and recurring (daily ,weekly, yearly) items.
   I found an old post that said to turn off sync calendar and deletethe items off the phone then turn back on. Well, I went into setting>mail>cloud and turned off calendar sync and waited 10 minutes. It deleted the duplicates but kept all the rest. I then went and turned calendar syncback on and all the duplicates showed up again.
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I found the answer.
1. plug the phone in to your computer or wall plug or this does not work!
2. Go to settings>Icloud> and turn off calander sync. Then delete all items. Now your iphone calendar should be blank.
3. Now got to Icloud.com and log in using apple ID.
4. Look at your calendar. On the left edit your calendars and remove all of them. Now your cloud calendar should be blank.
5. Now go back to your Iphone cloud setting and turn calandar sync on. After awhile your Iphone calander should match your Outlook calnder and your Icloud calander should too.

How to transfer a calendar items from one month to another

How can one transfer a calendar item from one month to another month by drag and drop.

Click it and hold, then drag. If you want to duplicate it, hold down the option/alt key while dragging.

Contacts and calendar items disappear when exchange server is off

Hi All
I've been having this problem for a few weeks now and it's most frustrating. My iphone is setup to sync over the air to our corporate exchange server. It seems that when the server is down for repair/patching ALL my contacts and calendar items disappear from my iphone. This doesn't seem to happen if the phone is out of signal?
I know that I can sync directly with Outlook, however this would then mean that the phone is only updated when synced with my laptop at work. If I sync both over the air AND with Outlook, I get duplicates of everything in my calendar.
I'm not restoring my iphone to factory defaults to get rid of the duplicates and go back to over the air sync only.
Does anyone have any ideas on how I can get calendar and contacts to work "offline" when the exchange server is down?
Main PC is running Windows 7 and exchange is 2007. This problem is only recent, I think in the last month of two. Nothing has changed other than the last few firmware updates from Apple.

hi, cheers for the info. That would make sense, however how come when I'm out of signal and not connected to wifi, the data doesn't also disappear as that too would render the server "unavailable".
Is there a way to make the iphone keep a copy of the data much the same as "offline mode" in Outlook where you can still browse your email, calendar and contacts when the server is offline, and it picks up where it left off when the server is available again?
I appreciate this may not be a "problem" as such, but is frustrating as all my contacts and calendar live in Outlook and I can't function without them
Message was edited by: spongmonkey

How to restore calendar items from Entourage 2008 after upgrade to Lion (10.7.5)?

I held off upgrading to Lion because I had a bunch of old email I wanted to convert first. But now that Apple is no longer offering security updates for Snow Leopard, I decided to take the plunge. Unfortunately, after the Lion upgrade most of my calendar items in Entourage 2008 disappeared (and those that remained appeared in duplicate).
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I need the July 8 or 9 version of: ~ / Documents / Entourage Backup / Main Identity.
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When I check my Time Machine preferences, only the following items are shown as excluded from backups:
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Any idea what I'm doing wrong in trying to restore from Time Machine? Or anything else I might be doing wrong?
Many thanks.

When I check my Time Machine preferences, only the following items are shown as excluded from backups:
Not sure how any of this relates to a Time Capsule....one of the hardware products that we support in this forum.....but we will try to help.
Main Identity is located as follows on your Mac:
Macintosh HD > Documents > Microsoft User Data > Office 2008 Identities > Main Indentity
Unfortunately, you have been excluding Microsoft User Data from your backups, so there is nothing to recover or restore.

Duplicate calendar entries - but not related to any kind of sync

I went on holiday for 3 weeks and during that time my iPod touch discharged completely. When I came back and charged it up again I saw that it had reset its date back to what I presume is the factory default of 01 January 1970. I set the date and time to the current date and time - and then discovered that all my MONTHLY and YEARLY repeating calendar entries (but not the WEEKLY ones) have all been duplicated. This is not the result of any kind of sync up since (following a complete system rebuild following a virus attack) I have not yet reinstalled iTunes on my PC and I have not knowingly synced with Outlook because I almost never use it. If I delete an entry that has been duplicated then BOTH entries are deleted. Has anyone seen this behaviour and can tell me how I can remove the duplicate entries? I have looked for posts relating to duplicate calendar entries but they all deal with syncing-related problems whereas mine is not. Thanks.

I have a similar issue. I bought an ipod touch last week and today I synced my entourage contacts, and address book. The address book entries are fine, but I have duplicates on my calendar. Now, its not duplicating per day, its duplicating the previous or next day. For instance, I have a birthday listed for today, it will also show for yesterday or tomorrow. What is causing this? I've checked the calendar on entourage and ical and both show correctly. (ical copies items from entourage)

Ios 5.0.1 duplicate calendar entries

I've just updated to ios 5.0.1 on my iphone 4. Now I get these strange duplicate calendar entries appearing on my iphone calendar, which aren't present at all in iCal on my mac???. I've never had these issues before and I thought that it may have something to do with iCloud, however I'm running OS X 10.6.4 on my laptop and I don't have iCloud settings to edit (I know I require OS X Lion for this to be available) via my settings on my mac.
Now to the I've list:
I've tried deleting the items manually on my iPhone (delete one event or all future instances), but they just don't go.
I've tried deleting my iCloud account altogether on my iPhone, however when I resync via iTunes all they same duplicate events return to my phone???
I've tried ticking the "Advanced/Replace information on this iPhone/Calendars" and then syncing again, but the same duplicate items return.
I've searched forum post after forum post and I can't find a solution to this problem.
I've removed most of the remaining hair through sheer frustration...
Basically the Calendar on my iPhone is totally useless now.
I won't be updating to OS X Lion as all of my audio software/hardware, of which I rely on on a daily basis, works perfectly with 10.6.4
Does anyone have a fix for this?

Oops! spoke too soon!
All seemed to be working fine, but after adding a test item into my calendar on my iPhone, all the duplicate entries magically appeared again.???
So now the annoying phantom duplicate entries are on my iPhone, but strangely not on my calendar on the iCloud.com web site and NOT on my calendar on my Mac.
I don't think I can waste anymore time stuffing around with this. Paper diary for me again I think...
I'm very disappointed as I was very much looking forward to shared calendars!
I hope Apple comes up with a fix soon.
Here's hoping...

Duplicate Calendars showing up

In iCal, I now have two versions of each of my three Calendars showing up: one set under [email protected], and another under MYNAME @me.com. How do I get rid of one or the other?

Read this background thread.
iTunes won't automatically eliminate dupes. It has two options to display them. File > Display Duplicates lists all items with the same Name. When holding down shift (option on a Mac, I think) File > Display Exact Duplicates lists items with the same Name, Track #, Disc #, Artist & Album.
Once displayed you still have to decide which tracks to eliminate. One of the common errors people make is to delete all the files shown whereas you want to keep one of each repeating group. With large numbers of files making these selections is tedious, if not almost impossible. Add that that to the fact that in some cases you need to preserve the file when deleting and in others you will want to discard it (and you can't easily tell which from looking at the information displayed in iTunes) and you can see why it is best to automate the process.
By all means make a suggestion at iTunes Feedback but in the meantime if you want a tool that works I have one for you, for free, and I'm happy to try my best to explain how it works. It's about to get an update which will let you keep the best quality (read largest) version when you have ripped the same tracks in multiple formats/bitrates over time and now want to tidy up.
tt2

ICal on iPad: please explain how to use the duplicate calendars

I am traveling with my iPad and cannot get on my computer. I want to add calendar events that will sync to MMe. I have checked off the calendars for @me.com. Sometimes the iPad duplicate switches on. I assume that i have this so i can see if i need to what is really on the iPad ND what is really on mobile me in case i don't have wi fi access. However Apple does not explain to us why so that we could understand our own systems. We are left to guess and stab in the dark. I want to add items that will go over to mobile me and to my phone. Do i add them in to the calendar that is on the ipad and then it will automatically sync the events?
I just edited some items that had previously been synced to mobile me. Those items are showing up synced to my phone so i know they went to mobile me. However i added some new items that went into the calendar on my iPad and those are not syncing (I wonder why apple has this odd system set up?)
So is there something i don't know about entering events in my iPad? Why would there be a dublicTe calendar kept that does not sync to the rest?
Please help! I can't go to my computer to reset hints for now i just have to know how to input events correctly into iPad so they will sync to mobile me and my phone. I have previously fine through resetting hints with mobile me support so it all should be set up correctly.
Thanks

Edited version (it won't let me edit)
I am traveling with my iPad and cannot get on my computer. I want to add calendar events that will sync to MMe. I have checked off the calendars for @me.com. Sometimes the iPad duplicate switches on. I assume that i have this so i can see if i need to what is really on the iPad and what is really on mobile me in case i don't have wi fi access. However Apple does not explain to us why so that we could understand our own systems. We are left to guess and stab in the dark. I want to add items that will go over to mobile me and to my iPhone. Do i add them in to the calendar that is on the ipad and then it will automatically sync the events?
I just edited some items that had previously been synced to mobile me. Those items are showing up synced to my iphone now so i know they went to mobile me. However i added some new items that went into the calendar "on my iPad" and those are not syncing (I wonder why apple has this odd system set up?)
So is there something i don't know about entering events in my iPad? Why would there be a duplicate calendar kept on the iPad that does not sync to the rest?
Please help! I can't go to my computer to reset anything for now i just have to know how to input events correctly into iPad so they will sync to mobile me and my phone. I have previously been through resetting everything with mobile me support so it all should be set up correctly.
Also I have the new iCal that was called beta ND it syncs through CalDav or whatever that is separate from the contacts and bookmarks.
Thanks
iPad wifi + 3G Other OS Why not give a choice for iPad in that list?

Duplicate calendars using Outlook for WINDOWS & iTunes

I sync my iphone at home with Outlook 2003 and at work with Outlook 2007. Hence, I get 1 - 2 extra calendars, each time I sync.
Do you think I would be rid of this problem if I used the same version of Outlook?

Hi,
What type of email account do you use (POP, IMAP, MAPI or Exchange)?
There are lots of reasons which might cause duplicate email items in Outlook. You can refer to the article below, it has listed the most common cause out there. You can work your way down to check if anything works for you:
Check if you have "Leave copy of message on server" checked.
Check for duplicate mail accounts.
Optimize your Rules configuration.
Firewall or Anti-Virus protection settings.
For more details, please refer to:
https://support.microsoft.com/kb/2685726
Regards,
Ethan Hua
TechNet Community Support
It's recommended to download and install
Configuration Analyzer Tool (OffCAT), which is developed by Microsoft Support teams. Once the tool is installed, you can run it at any time to scan for hundreds of known issues in Office
programs.

On my iPad 3, how do I make calendar items lasting more than one day appear as such on the monthly view of my calendar? Right now only the first day of the item appears.

On iPad 3, all of my calendar items lasting more than one day do not appear correctly when looking at the monthly view of the calendar; only the first day of the appointment appears. For example, if I am taking a vacation for 4 days, only the first day of the vacation is marked on the calendar, instead of being listed on all 4 days. When I look at the weekly view, however, it is correct and is listed on all 4 days. The problem here of course is that at a glance, there is no way to look at my monthly schedule. On my iPhone, everything is correct, regardless of month or week view, so clearly this is an iPad problem I guess? Please advise on how this can be corrected. Thank you!

Unfortunately you can't do what you want. Many people have complained to Apple about this. I suggest you provide Apple feedback directly at http://www.apple.com/feedback/macosx.html. They will not provide a direct response but hopefully if enough people provide feedback Apple will fix this.

BTREE and duplicate data items : over 300 people read this,nobody answers?

I have a btree consisting of keys (a 4 byte integer) - and data (a 8 byte integer).
Both integral values are "most significant byte (MSB) first" since BDB does key compression, though I doubt there is much to compress with such small key size. But MSB also allows me to use the default lexical order for comparison and I'm cool with that.
The special thing about it is that with a given key, there can be a LOT of associated data, thousands to tens of thousands. To illustrate, a btree with a 8192 byte page size has 3 levels, 0 overflow pages and 35208 duplicate pages!
In other words, my keys have a large "fan-out". Note that I wrote "can", since some keys only have a few dozen or so associated data items.
So I configure the b-tree for DB_DUPSORT. The default lexical ordering with set_dup_compare is OK, so I don't touch that. I'm getting the data items sorted as a bonus, but I don't need that in my application.
However, I'm seeing very poor "put (DB_NODUPDATA) performance", due to a lot of disk read operations.
While there may be a lot of reasons for this anomaly, I suspect BDB spends a lot of time tracking down duplicate data items.
I wonder if in my case it would be more efficient to have a b-tree with as key the combined (4 byte integer, 8 byte integer) and a zero-length or 1-length dummy data (in case zero-length is not an option).
I would loose the ability to iterate with a cursor using DB_NEXT_DUP but I could simulate it using DB_SET_RANGE and DB_NEXT, checking if my composite key still has the correct "prefix". That would be a pain in the butt for me, but still workable if there's no other solution.
Another possibility would be to just add all the data integers as a single big giant data blob item associated with a single (unique) key. But maybe this is just doing what BDB does... and would probably exchange "duplicate pages" for "overflow pages"
Or, the slowdown is a BTREE thing and I could use a hash table instead. In fact, what I don't know is how duplicate pages influence insertion speed. But the BDB source code indicates that in contrast to BTREE the duplicate search in a hash table is LINEAR (!!!) which is a no-no (from hash_dup.c):
     while (i < hcp->dup_tlen) {
          memcpy(&len, data, sizeof(db_indx_t));
          data += sizeof(db_indx_t);
          DB_SET_DBT(cur, data, len);
          * If we find an exact match, we're done. If in a sorted
          * duplicate set and the item is larger than our test item,
          * we're done. In the latter case, if permitting partial
          * matches, it's not a failure.
          *cmpp = func(dbp, dbt, &cur);
          if (*cmpp == 0)
               break;
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What's the expert opinion on this subject?
Vincent
Message was edited by:
user552628

Hi,
The special thing about it is that with a given key,
there can be a LOT of associated data, thousands to
tens of thousands. To illustrate, a btree with a 8192
byte page size has 3 levels, 0 overflow pages and
35208 duplicate pages!
In other words, my keys have a large "fan-out". Note
that I wrote "can", since some keys only have a few
dozen or so associated data items.
So I configure the b-tree for DB_DUPSORT. The default
lexical ordering with set_dup_compare is OK, so I
don't touch that. I'm getting the data items sorted
as a bonus, but I don't need that in my application.
However, I'm seeing very poor "put (DB_NODUPDATA)
performance", due to a lot of disk read operations.In general, the performance would slowly decreases when there are a lot of duplicates associated with a key. For the Btree access method lookups and inserts have a O(log n) complexity (which implies that the search time is dependent on the number of keys stored in the underlying db tree). When doing put's with DB_NODUPDATA leaf pages have to be searched in order to determine whether the data is not a duplicate. Thus, giving the fact that for each given key (in most of the cases) there is a large number of data items associated (up to thousands, tens of thousands) an impressive amount of pages have to be brought into the cache to check against the duplicate criteria.
Of course, the problem of sizing the cache and databases's pages arises here. Your size setting for these measures should tend to large values, this way the cache would be fit to accommodate large pages (in which hundreds of records should be hosted).
Setting the cache and the page size to their ideal values is a process of experimenting.
http://www.oracle.com/technology/documentation/berkeley-db/db/ref/am_conf/pagesize.html
http://www.oracle.com/technology/documentation/berkeley-db/db/ref/am_conf/cachesize.html
While there may be a lot of reasons for this anomaly,
I suspect BDB spends a lot of time tracking down
duplicate data items.
I wonder if in my case it would be more efficient to
have a b-tree with as key the combined (4 byte
integer, 8 byte integer) and a zero-length or
1-length dummy data (in case zero-length is not an
option). Indeed, these should be the best alternative, but testing must be done first. Try this approach and provide us with feedback.
You can have records with a zero-length data portion.
Also, you could provide more information on whether or not you're using an environment, if so, how did you configure it etc. Have you thought of using multiple threads to load the data ?
Another possibility would be to just add all the
data integers as a single big giant data blob item
associated with a single (unique) key. But maybe this
is just doing what BDB does... and would probably
exchange "duplicate pages" for "overflow pages"This is a terrible approach since bringing an overflow page into the cache is more time consuming than bringing a regular page, and thus performance penalty results. Also, processing the entire collection of keys and data implies more work from a programming point of view.
Or, the slowdown is a BTREE thing and I could use a
hash table instead. In fact, what I don't know is how
duplicate pages influence insertion speed. But the
BDB source code indicates that in contrast to BTREE
the duplicate search in a hash table is LINEAR (!!!)
which is a no-no (from hash_dup.c):The Hash access method has, as you observed, a linear search (and thus a search time and lookup time proportional to the number of items in the buckets, O(1)). Combined with the fact that you don't want duplicate data than hash using the hash access method may not improve performance.
This is a performance/tunning problem and it involves a lot of resources from our part to investigate. If you have a support contract with Oracle, then please don't hesitate to put up your issue on Metalink or indicate that you want this issue to be taken in private, and we will create an SR for you.
Regards,
Andrei

Duplicate calendar items

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