Problem with synchronization of a single appointment

[dasOe]

BirdieSync runs till this day without any problems.
Suddenly I got the following error:



There is NO appointment on this date neither on the iPhone or on the Desktop-based Thunderbird/Lightining.
The synchronization is canceled.

BirdieSync Version: 2.4.9.0
Thunderbird Version: 24.6.0
Windows 7
iPhone: 5c Version 7.1.1

I am using a regular active BirdieSync Licence.

[Birdy]

Hello dasOe,

Right after you have the synchronization error, could you send your logs to support ?
First, transfer the mobile device log to the desktop with "Help/Transfer mobile device log" while your mobile is connected.
Then build the log archive BirdieSyncLog.zip with BirdieSync menu "Help/Archive logs..." and send it to support(at)birdiesync.com.
Thanks.