Hi,
We are currently working on SAP BPC 11 and we are facing an issue while trying to retrieve Member IDs from Entity Dimension based on Entity Group user selection.
Below is the screenshot of Entity Dimension,

Below is the user selection screen,

In above we have used EPMSelectMember to derive Entity Group from Entity dimension in R69 and based on the Entity Group Selection we want the list of entities related to that particular entity group to be displayed for user selection in R70.
Thanks!
Samhita