Log error message with member names.

Good day, I'm tasked with preventing a calculation manager rule from running if all the required fields are not populated. To prevent a 1/2 answer in the system. I've found the function @return which will stop the rule from running and will present a custom error message. The area that I'm struggling with is to identify for the user which fields are empty.

There are 5 fields that are required and I would like to customize the message to say that fields 1 & field 4 are missing. The function can be used to as follows        @RETURN(@CONCATENATE("The populated : ", @NAME("wageLossPlan")) , ERROR);

Any suggestions on how to create a dynamic list or array?