it's me again . Now everything worked fine (after installation chmod the directory and created the dhcp files manually (endpoints.conf and so on)).
Modems can now created without failures with geocoding, too.
But in HFC Topography, after creating all necessary Elements (Net, CMTS, CLUSTER, NODE, Amplifier and for example 1 MPR), only a white page with fields for US and so on appears.
In LOG no failure is displayed.