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I am using processing with eclipse and I have gotten it working well, but then I open my project and it fails to compile when I make changes. I checked errors and now I have build path error "missing required library core.jar". I have no idea why it is not working anymore. Can anyone help?
I have checked the build path, and the libraries are implemented correctly.
And yet this error is still occurring.
Anyone know what could have happened? Again, I have been able to build this project before, but now, after no changes to the build path, I am getting an error.