Error "SNC Library not found" when connecting to ABAP System from ADT

Hi,

I have installed SAP HANA Studio (Version 64) and ADT Tools from update site https://tools.hana.ondemand.com/juno/. All worked more or less fine ...

When I try to connect to the backend system (via File->New->ABAP Project -> Select the System from the List generated by SAPGUI ...) I get the following error message:

Logon to system I7D failed (SNC Library not found; environment variable  "SNC_LIB_64" not defined, fallback location does not exist: "C:\Program  Files\SAP\FrontEnd\SecureLogin\lib\secgss.dll" )

I searched on my laptop ... there is no such file secgss.dll.

I can log on to the system with user + password (also from eclipse) but I would prefer using the SNC and SSO.

Does anybody know where my mistake is?

Kind regards,

Veronika