I am trying to hotsync and keep getting the following message:

HotSync Error: An application cancelled sychronization or failed to respond to a HotSync notification. Please ensure that you are not currently editing data using applications such as Palm OS Desktop or Install Tool. (8009)

What can cause one to get this message? As far as I know I am not currently editing anything when I am trying to hotsync.

I would appreciate any advice. I have a Treo 650.