Snapshot animation - body definition

Hi,

I'd like to create a snapshot-animation of an assembly.

I click on "animation->new snapshot animation". Then I click on "body definition" to define the group of parts that have to move together. I want to select multiple subassemblies that have to move together. I can select them, but when I click "OK" Creo only selects one of them.

Here you can see a video:

https://youtu.be/zlAQYClzqzU

How can I move those subassemblies together ?

Thanks,

Maik