I have sometimes compilation errors in my ee. in one of me custom extensions I have places with import to a file that is not exist . This file is being generated in platform in the bootstrap folder. But it is not always being generated (it is not in the file system , so refreshing ee doesn't help) which show me compilation errors in my ee , although I can do ant clean out of ee with no problem and start the server with no errors. Can you please explain me this ?