Count_Binary alt_u8 not found

What do you mean. I installed Quartus 13.0.1 spi Webpack. NIOS was included which uses Eclipse. I created a NIOS II/s processor. Then, started Eclipse and created a new project. I used count_binary. This compiled and executed OK. However, when I closed Eclipse and then started it again, the count_binary.c file showed errors. What I did was to add to include statements in the count_binary.c file: # include "alt_types.h"# include stdio.h The errors went away. If I remove the two lines the errors come back. Both of those includes are in the count_binary.h file. So, why did Eclipse find these files when the project was first created but doesn't if you close Eclipse and start it again? Something is being altered.