SYMPTOM:
In Strategy Developer 10.0, "Use a filter to reduce the number of elements" feature in attribute element prompt does not work in an Intelligent Cube report.
STEPS TO REPRODUCE:

3. Create an Intelligent Cube with attributes Year, Month and Region;
4. Create a report based on above Cube and add the prompt in view filter. Run the report, notice that the filter does not work, all attribute elements pop out, as below picture shown:

CAUSE:
This is a known issue in Strategy Developer 10.0.
ACTION:
This issue has been addressed in Strategy 10.4. Upgrade to this version to take advantage of this fix.