Need help to visualize NVIDIA OptiX optix_advanced_samples

I followed the instructions to run the examples from optix_advanced_samples. I could build it but the application files do not run.
More specifically, I got this error while trying to clean build it in NetBeans.

optix_advanced_samples/src/optixIntroduction/optixIntro_01/src/Application.cpp:29:10: fatal error: shaders/app_config.h: No such file or directory

Though the header file is there and I have manually included it in the project