Yes, refreshing eclipse solved my problem. I am trying to use basic CAN communication with SAM4E8E. Thanks a lot.

Hi, I am quite new to eclipse. In my project, I am using duet 2 wifi with CAN communication for that I have added can.h and can.c in CoreNG\asf\sam\drivers\can which is compatible with SAM4E8E. But when I build CoreNG with Build Configuration SAM4E8E_RTOS 'can' drivers don't appear in driver list in eclipse. Is there any file in which I need to add any kind of header so that when I build SAM4E8E_RTOS of CoreNG so that 'can' drivers also get compile.