Customer Reminder Total of Column field blank

Hi,

Does anyone know why the 'Total of column" drop down is blank when trying to add a Custom Reminder? This is for a custom smartlist I created using RM10100 with a calculated field.

I created a favorite from the custom smartlist and have tried setting a reminder both from the custom smartlist and the favorite of the custom smartlist.

Both show a blank dropdown in the "Total of column" field.

Thanks for your help.

-Jae