gistfile1.js

gulp.task('styles', function () {
    gulp.src('less/main.less')
         .pipe(less(function () {
           this.emit("error", new Error("Something happend: Error message!"))
         }))
         .on("error", notify.onError(function (error) {
           return "Message to the notifier: " + error.message;
         }))
        .pipe(gulp.dest('css'))
        .pipe(livereload());
});