For an .ics feed, for which syncing with ICSDroid has worked fine for some time, I'm now getting a Synchronization Error: "Couldn't delete local events". The calendar behaves as the error message indicates: new events are synced to the calendar, but events which are deleted from the .ics file are not deleted from the local Android calendar when syncing.
I've already tried to delete and recreate this synchronization in ICSDroid as well as the calendar, I still get this error message. Some other .ics feeds synced with ICSDroid work fine.
As I suspected some entries in the calendar might be the issue, I've removed the recent entries entries from the .ics file, and voilà - it syncs again. Just to verify I've created an .ics file which only contains these recent events, but than it also syncs fine!? To further narrow down the issue I've split the .ics file, and than both parts sync fine.
As the calendar file has grown to a little bit over 4MB (~ 4.2 MB), my suspicion would be there is an issue with .ics files bigger than 4MB?!
Any help or workaround gladly received, thanks!
Samsung Galaxy S5, Android 5.1.1