SBT 12.1 (Indigo) Problems with includes from bsp

Hi all,

i updated the NIOS II SBT from 11-1SP2 to 12.1 and now all include-files which are located in my bsp are underlined red/orange an eclipse tells me that is is not able to resolve the inclusion. But compiling the project still works. For example it cannot resolve include "alt_types.h" and others. Do i have to change or update something in my settings or is there a bug in 12.1?

Thanks, Paddy