Why do errors no longer appear in Eclipse's package explorer?

Question

My project used to be fine - errors showed up in the file margin, the editor breadcrumb, the problems view and in the package explorer tree as little red X marks.

Somewh

Answer 1

I had a similar problem. I imported a project which also uses aspectj. compile errors were shown in the editors, but not in the package/navigator-explorers. And the project was marked as java-project, maven2 and aspectj.

Build path seemed ok.(jre was there, maven and aspectj.)

After long search i found that in the .project file the following entry was missing:

    
        org.eclipse.jdt.core.javabuilder
        
        
    

pasted that in and problem was solved!