NI System Configuration APIs -> Init session -> Error nierinterface.dll

Hi,

i tried to use the VIs from the system configuration api:

http://zone.ni.com/reference/en-XX/help/373107E-01/nisyscfg/initialize_session/

When i start my VI or if i try to open the VIs "init session" i got the message

System Error

nierInterface.dll is missing.

Reinstall the software.

Google Search "nierinterface.dll" -> 0 resulst

NI Forum Search "nierinterface.dll" -> 0 results

Can someone tell what DLL that is? How should I find it, when google doesn't know that :-) Very funny :-)