I don't know how I got the wrench on some of my files. I've tried reseting the resource. I've tried deleting the elements for the resources in the .cproject files. I've tried looking in the resource property indexes. I even tried deleting the files and reimporting them. No matter what I do the wrench, is stuck to some files. There is no apparent reason. I can change any other resource and reset set it again to make the wrench disappear. Major annoyance.