Why I am getting this error? "Nothing to build for project"

[BMano]

Hello guys, I was working with this code with no problem. I changed a couple of things in main.c and then removed it because it didn't work. Now, when I am copy and past the source code to the same folder again, I get this error and can not compile it anymore. I am pretty sure the code has no problem as it was working before.

Cheers,

[Bob S]

What happens if you do a "project->clean" and then try to build?

[BMano]

Hey Bob. Thanks for your reply. I did try Cleaning the project but didn't help. I also closed the project and open it, import it again etc. but non of them worked :(