There are several behaviors that allow variables. Make sure you use the proper syntax when adding a variable to one of these behaviors. See Variables overview for details.

How to

1. Add a variable-supporting behavior to a rule.

2. Type {{ into the variable field and select a variable from the dropdown. In includes, type in {{user. to add a local variable or {{parent. to add a global variable. You can also combine various types of variables in a single field.