I using MyEclipse 8.6.1 for development my applications. I get "build.properties does not exist" errors in some project, but workspace compiled and run without problem, only error image(a red image) shown in project root. I search in frume for solve this problem, in some case say this "reason of this problem is or in .project file", but I don't see any problem to this file.
I fixed this by:
Project/Properties/Builders uncheck all builders Commit
Project/Properties/Builders re-check all builders Commit