The dependent drop down list system has limitations due to:

  1. Relationship organization in the logical model
  2. Readonly set-ups on dependent drop downs

Organization of relationships in the logical model

In each case where there are two or more relationships that reduce the values acceptable by a dependend drop-down, FormWork throws an exception: 


In the above image, you can see two drop-downs acting together on Agent, so the system prevents the reading of the form.

Readonly setup on dependent drop-down lists

If a drop-down list is influences by a second drop-down list, it cannot be readonly unless the 'parent' drop-down is readonly as well.