I kept getting this error once the Desktop manager completed the synchronization with my Blackberry. Following these steps, suggested by Blackberry support, worked for me so they may work for you.

This relates to Version 4.2.2.1 so the instructions may vary slightly with your version.

Open up the Desktop Manager. The fifth icon in the display reads "Synchronize". Double click on that to open it. If Automatic Synchronization is checked, uncheck it. The next steps will try to isolate where the issue is coming from.

Now on the top of that same screen, there is a tab labelled Configuration. Click on that. Select "Configure Synch". If it is greyed out, it is likely that your Blackberry is not connected. Go ahead and connect your blackberry to the computer.

Now you will see the four areas that can be synchronized. Uncheck all by one and then select OK. Go back to the "Synchronize" tab and select "Synchronize Now". Do this for all areas that you are synchronizing.

In my case, the issue was caused by "Tasks". Right after synchronizing Tasks, the application crashed but not with the other items of Address Book or Contacts. So, the issue, in my case, was with "tasks".

Just performing this task, cleared the corrupted data for me. Once everything is working, you can reset the Automatic Synchronization back to being checked and you can select all of the areas you want synchronized.

Hopefully, this will help you. It worked for me...