This is a message from the iCalendar parser. It means that it stumbles over unexpected tags. Did you import public calendars? If you have no concerns about the calendar file, please send as a private mail so that we can analyse what is going wrong.
I have a bunch of calendars that I am subscribed to. What do you need sent to you? Here are some of the calendars I subscribe to:
webcal://ical.mac.com/ical/US32Holidays.ics
webcal://cscl.ist.psu.edu/public/calendar.ics
webcal://cscl.ist.psu.edu/public/hci/calendar.ics
webcal://ical.mac.com/oxomega/Penn32State32Football.ics
webcal://ical.mac.com/ical/Virginia32Tech32Football.ics
webcal://www.hokiesports.com/cgi-bin/new-schedule/vt.vcs?sport=football
webcal://ical.mac.com/ical/Steelers.ics
This seems to be the "bad boy"...
Someone else has also reported the same problems with the SLMEMO.BOX (http://www.dsitri.de/phpBB2/viewtopic.php?p=213#213). This is the DTM file for storing "Text Editor/Notes" or Stickies. It could be that Sharp 3.13 ROM does not create this file on a hard reset until you use "Text Editor/Notes". And dtm2xml tries to create a new one but this fails. We have tested mostly on a C860 with ROM 1.4JP and a SL5500G with ROM 3.10 which might be a little different to yours.
OK, I created a note in the Text Editor app and it now seems to sync without error messages.
Unfortunately, it created duplicates of all my addresses inside my Mac's Address Book. The duplicates instead of saying "work" or "home" next to the e-mail address have a "1" instead and also seem to be missing icon and maybe other data.
It is also unclear to me why it's looking at calendar stuff if the only thing I have checked to update is "Address Book".