For this type of error you will need to hard reset the E2. Hopefully you have all your data in Palm Desktop. After the hard reset, change the hotsync conduits to desktop overwrites handheld and sync.
Click on the following link to the kb.hpwebos.com webpage for the article regarding reset procedures
http://kb.hpwebos.com/wps/portal/kb2/common/article/887_en.html
You may want to export your data for backup purposes first in case something happens during the sync.
The best way to preserve your data is to export the data in each category in Palm Desktop to a seperate folder on your PC.
Create a new folder on your PC somewhere that is convenient. Name it something like Palm Desktop Data. Click on the link below and follow the instructions on that page for the export procedure.
http://kb.hpwebos.com/wps/portal/kb2/common/article/28734_en.html
Make sure you select all for the range in the export window.
With the data saved in the folder you created, make a copy of that folder and save to a flash drive, cd-rw or external hard drive.
Anytime you make a change in Palm Desktop, export the data that was changed to that folder and save again to the external media.
With this process you can always import the data back into Palm Desktop anytime you have a problem with the data in Palm Desktop or if your computer/hard drive/device crashes.
For reference purposes, click on the following link for the support page for your device on the kb.hpwebos.com webpage.
http://kb.hpwebos.com/wps/portal/kb/na/tungsten/e2/unlocked/home/page_en.html
There are links on the page to the user guide, troubleshooting, how to's, downloads, etc.
