I tried to specifiy an additional Includepath in µ-Vision 2 under Options for Target->C51->Include Paths. This worked well with a hardcoded path. Now I want to ste this path in a Winodws-NT-Enviroment-Variable using the Dos command "set INCPATH=D:\INC". If I use %INCPATH% or $(INCPATH) it dosn't work. Can someone help me?