Building a master/slave reference selector pair

Hi, I am pretty new to Mendix and am trying to do something that is fairly common – building a master slave dropdown. The issue that I am hitting is that I cannot get the slave dropdown to reload when when the master value changes, only when it is empty.  Initial Setting Selecting the master dropdown fills the slave dropdown Changing the master from “Northeast” to “Mid-Atlantic” does not repopulate the the slave (Illegal combination) If I set the master to empty and THEN select to Mid-Atlantic, I get the right entries:   Is there a way to force the slave to reload when the master changes without having to go through the empty state? Thanks!
1 answers

I have just discovered the “constraints” tab. I was able to implement this via constraints,