Diagnosis
Deleting a reminder rule is allowed only if none of the reminder datesbelonging to it has been designated as fixed or completed (the Fixed
or Done indicator is set).

Procedure
Some reminder rules allow you to enter an end date for the list ofdates. To keep the dates that have been fixed or completed up to now,change the end date.
To delete the entire reminder rule, select all of the dates and removethe Fixed and Done indicators.