There are a couple of reasons why you might be getting an error message when trying to insert occurrences into a recurring Aero:
- You have left both the 'Repeat Until' AND the 'Or Ends after' fields empty. You must fill out one of those fields.
- Aero doesn't like the date format for the Start Date or End on Date of the Master Aero. Make sure that the date is in this format: mm/dd/yyyy