SAP CRM Marketing: delete Segmentation Basis

Hi,

I'm searching for a possibility to delete obsolete (and not used) segmentation basis from our system. As a workaround I've assigned a usage on which no user is authorized (by authorization object CRM_SEGTYP) but I prefer to have them really deleted to keep the system clean. I'm working on a system with CRM 7.03 EHP3 without business function CRM_MKT_HVS activated.

Thanks for hints,

Achim