ICal erased and can't retrieve or add new

I opened my iCal this morning and it was blank and now even when I try to manually put in appointments, it won't save anything. ideas?

Greetings Moira,
Do you have a backup (like Time Machine)?
What version of the Mac OS are you running?
You can try reseting iCal to see if that brings the events back, otherwise if you don't have a backup then you will either have to re-enter the events or contact a data recovery company for assistance.
To reset iCal:
Remove the following to the trash and then restart the computer:
Home > Library > Caches > com.apple.ical
Home > Library > Calendars > Calendar Cache, Cache, Cache 1, 2, 3, etc. (Do not remove Sync Cache or Theme Cache if present)
Home > Library > Preferences > com.apple.ical (There may be more than one of these. Remove them all.)
---NOTE: Removing these files may remove any shared (CalDAV) calendars you may have access to. You will have to re-add those calendars to iCal > Preferences > Accounts.
Once the computer is back up and running open iCal and test.
Hope that helps.

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