Why building operation did not stop even if I click execute Build in menu

Execute Build is canceled after executing the Build command for the current file(or executing the current phase) in High-performance Embedded Workshop.

Please choose [Build->Terminate Current Tool] If you don't recieve a reply after awhile from project builder, the current process may have crashed. A file which is output from a crashed tool is invalid.

Please re-execute the phase by deleting these output files.