The project cannot be built until the build path errors are resolved.

Question

While compiling an android project in eclipse 3.4.2, I am getting The project cannot be built until the build path errors are resolved.

I got a

Answer 1

I've seen this problem a few times (got it again right now on my home computer with Eclipse 4.2).

Forcing a resave (by changing the classpath e.g. by adding a library, save, change-back) works temporarily. But the problem comes back when Eclipse is restarted :(

Nuking the Eclipse workspace from orbit will permanently fix it (until next time). But there must be a better way!