Address lists created with FileMaker™ can be imported into CoStar App by saving the FileMaker™ list as a tab separated text file. This is done by selecting Output To... in FileMaker™.
Give the file to be saved a name, different from that of the list you will be using in CoStar App, select tab separated text file and select the fields to be saved.
Before leaving FileMaker™ make a note of the number of fields in each record and the order of the fields. You will need this information to describe the list in CoStar App (See Import).