Assembly processing: Create many WBS for an unique Network?

Hi Experts,

The assembly processing runs, but I want to create a complexe WBS Structure and only one global network.

When I generate automatically the project from the sales order, only one WBS Element and one Network are created, despite of a complexe structure in the standard project.

If I affect activities under each standards WBS, the complete structure appears but I must delete each activities deleted for save the desired project structure.

Exist there a solution to generate on network without activities, and a complexe project structure ?

The question 1162886 don't solved my problem and the "only one root" is not ticked on OPSA.

Thanks a lot for you help

herieric