Validate user must install at least one of sub features

Question

Here is the structure of my Application's Installer in FeatureTree/SelectionTree

Application Core
    |_ _ Feature 1
    |_ _ Feature 2
    |_ _ Feature 3

I want make sure that when user selects Application Core, he must select atleast one of Feature 1, Feature 2 or Feature 3.

I know Condition element under feature can be helpful, but was not able to get it working, Anyone at rescue?

Answer 1

You need to validate the ADDLOCAL property and disable the next until button it has the "correct" value.
You can look at the EULA dialog for sample, the next button there is disabled until the user press the check box of agreeing to the EULA.