gulp-less not creating output css -

i've been struggling few hours now. have following in gulpfile:

gulp.task('styles', function() {   gulp.src('c:\\teamcity\\buildagent\\work\\5003e8de5901599\\dev\\content\\css\\less\\dealer-landing.less')     .pipe(less())     .pipe(gulp.dest('c:\\teamcity\\buildagent\\work\\5003e8de5901599\\dev\\content\\css')); }); 

i run 'gulp styles' completes no errors, .css never created. tried commenting out middle line seen below , works expected; less file gets copied dest directory:

gulp.task('styles', function() {   gulp.src('c:\\teamcity\\buildagent\\work\\5003e8de5901599\\dev\\content\\css\\less\\dealer-landing.less')     //.pipe(less())     .pipe(gulp.dest('c:\\teamcity\\buildagent\\work\\5003e8de5901599\\dev\\content\\css')); }); 

any idea why gulp-less doesn't generate css? if use less, file generated correctly.

i experienced due undefined class in less file.

i discovered undefined class through logging.

gulp may not throw errors unless explicitly log them. log, require gulp-util in gulpfile:

var util = require('gulp-util');

and add logging:

.pipe(less().on('error', util.log)),

run gulp style see error (possibly undefined class).

fix , style task should generate css.