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Using a field as a filter. How to determine if it's empty or not?

Question asked by Monique Ribeiro on Feb 23, 2018
Latest reply on Feb 26, 2018 by B_Canales

I would like to use a custom field as a filter, considering that this field is empty or not. So, I'm using the field as a Dependent and the following formula: greaterThan(strlen($last_activity_date_c),0). However, when I hit save, the system says the formula is invalid: strlen: All parameters must be of type 'string'. Any ideas what should I do here?