.Mac Sync Error

Question

I keep two computers synced via .Mac. Until just recently there's been no problem. My PowerBook runs its normal sync routine (and syncs properly with my Palm). When I try then try to sync my iMac it doesn't work, and this error message comes up:
[ISyncConcreteSession pushChange:]: you can't modify a record that doesn't exist: <ISyncChange 0x15c8a50>{ modify record id 'C200015D-D6D5-4DD3-A476-9C088352A955'
set com.apple.ical.type = local
set title = Unfiled }
NOTE: the problem seems to only affect the calendar.
I booted up from the system disk and corrected the permissions. I also ran the repair function, which reported that there was nothing needing repair.
Beyond that I haven't a clue. Thanks in advance for any help.
iMac G4 + PowerBook G4   Mac OS X (10.4.8)  

Answer 1

This is actually a .Mac Sync issue, for which a forum exists here:
http://discussions.apple.com/forum.jspa?forumID=957
It is triggered though, by an issue involving iSync and your Palm device. iSync creates a default Unfiled calendar, into which all Palm-created events are transferred each time you synchronize. This particular iSync feature has behaved inconsistently since the evolution of iSync 1.5 to iSync 2, and subsequent releases have not corrected the strange behavior it sometimes exhibits. Your issue is an extension of those behavioral problems.
Assuming that the error message appears on your iMac, which is synchronized with .Mac Sync but to which you do not synchronize your Palm device, then you need to reset your synchronization data by opening the System Preferences application on your Powerbook and execute these steps:
• press the .Mac icon
• press the Advanced tab
• wait for your registered computer list to be updated, then press the Reset Sync Data… button
• from the Replace: drop-down menu, choose Calendars
• click on the right-facing arrow, so that the orange animated arrow moves from left to right
• be sure that the phrase above it says, "On .Mac with sync info from this computer."
• press the Replace button
Once that process has been completed, go to the iMac and execute the same process, except in the opposite direction: you want to press the left-facing arrow so that the orange animated icon runs from right to left, and the phrase above it says, "On this computer with sync info from .Mac."
That should force the creation of the now non-existent Unfiled calendar on the iMac, and allow synchronization to occur properly.