# Troubleshooting - iCal

- [My HBook iCal calendar URL is not accepted](./troubleshooting-ical/my-hbook-ical-calendar-url-is-not-accepted.md)
- [How can I check if my HBook iCal calendars are cached?](./troubleshooting-ical/how-can-i-check-if-my-hbook-ical-calendars-are-cached.md)
- [HBook does not update with my iCal external calendars automatically. The sync has stopped.](./troubleshooting-ical/hbook-does-not-update-with-my-ical-external-calendars-automatically-the-sync-has-stopped.md)
- [I have a message indicating that "HBook iCal calendars URLs are currently cached".](./troubleshooting-ical/i-have-a-message-indicating-that-hbook-ical-calendars-urls-are-currently-cached.md)