Created attachment 613900 [details]
Repository with enumeration, model and DSL definitions

Description of problem:


Version-Release number of selected component (if applicable):
BRMS 5.3.1 ER1

How reproducible:
Every time

Steps to Reproduce:
1. Create simple enumeration ('Person.sex': ['male','female'])
2. Create declarative model (Person: String sex; Integer age)
3. Create DSL ([when]Person which sex is {v:ENUM:Person.sex} = p:Person(sex=="{v}"))
4. Create new business rule
5.   - click on icon "Add condition to this rule"
6.   - select "Person which sex is {v}"
7.   - confirm dialog (click OK)
  
Actual results:
There is a modal alert which has two options "halt the script" and "wait more time".
If I click on option "wait more time" then the alert occurs again (try 5 times)

Expected results:
No alert occurs. Just show DSL sentence in business rule.


Additional info:
A repository with assets from step 1 to step 3 is attached.