[ozrien]

That's a bummer usually re-indexing fixes it, but I still think it's syntax parser related only because you said the project still builds, and I know for a fact ConfigPotentiometerTurns is implemented (it's an empty implementation).

Just to sanity check (I'm sure you did this too) but maybe it might help another team having similar symptoms....

-navigate to the Problems tab and manually delete all the errors and warnings. You can highlight the treenodes in there and press delete or right-click-menu-delete. Eclipse will warn about deleting the error being permanent, hit ok.

Then in the project explorer, under binaries delete your FRCUserProgram. This step is necessary just for checking that the project does build.

Close all other open projects in eclipse except for the one you care about.

Clean the project. (takes a min, while you wait the build menu item will be gray)

Full build (or CNTRL+B), and let it finish.

Confirm FRCUserProgram is back (because it built ok).
Confirm if you still get the parser errors.