java - Open Declaration won't work for some projects in Eclipse Mars 4.5.2 -


i'm using eclipse mars 4.5.2 develop several jdk 1.8.0_74 java projects.

the thing - 1 of these projects, things open declaration function declarations , such work fine 1 project. doesn't work. i'm not doing different or setting different know of.

i never had problem kepler. open declaration et al worked right out of starting gate.

any suggestions?

thanks in advance.


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