I checked my current calendar tables with the tables that wil by created by
<path>/plugins/calendar/SQL/mysql.sql and found out that there are differences.
Is there an easy way to fixs this? Maybe that wil solve the error message.
One thing that I allready changed because it was missing, the url field in events, events_cache, events_caldav etc etc
"ALTER TABLE events ADD url TEXT;"
I did this for al tables that had url missing.
Grtz, iNeo