I noticed that I had a project named RemoteSystemTempFiles which I never have created. After googling it seems to be plugin feature on eclipse, but didn\'t got any other idea of
I had a similar issue using PHP Explorer perspective. I always had the problem that Eclipse could not save project metadata. I selected the "filters" to uncheck RSE Temporary Project. Once it appeared in the tree view, I right click to delete it.
Then I can check again to keep same initial config.