Maybe your indexer database is corrupted. Try right-click on the project, then use Index > Rebuild.
Other than that, I would try that project in a new workspace. Maybe something is wrong with the workspace .metadata?
I hope this helps,
Erich
Rebuilding the index did not work, even deleting the project from the workspace and re-importing it, or re-installing MCUXpresso did also not work. I since updated to MCUXpresso 11 and that seems to work fine
ok, thanks for closing the loop.