I have noticed that there are lots of include paths being genereated by the carbide express 1.1 app generator. as far as I can see, most of these paths do not include anything related to Symbian OS, and there are also paths that do not exist in the SDK itself, which means that an error is generated when compiling the app.
An example of the first path can be seen in the C/C++ projects tab under the Includes header. Folders starting at drive:/program files/Nokia/Carbide.c++/ appear to be Standard C++ include files, which Symbian OS do not need. There are also things like alloca.h
An example of the second category are paths in the current Symbian SDK, in particular <SDK>/epoc32/include/oem.