BPC 10.1: Cannot delete Dimension Members

Hi There,

I am implementing BPC 10.1 Consolidation for my Customer and I am facing the following issue:

I have just started to build my Models and dimensions, so all the BPC and BW Cubes are empty.

When I am trying to remove a Member in any dimension:

Then, when I am saving and process the dimension:

The Member deleted is back:

I have a work around by deleting master data in BW via RSA1 (And execute the program UJA_REFRESH_DIM_CACHE) but I would like to make all the Administration in BPC.

Do you have any idea why BPC do not let me any deletion of dimension members?

Thanks in advance for your help

Louis