value at the time of conversion of px from rem might be multiple output.

[kamem]

Is there a way to solve this problem?

[iamvdo]

Can you share your config ? Never see that.

[kamem]

gulpfile looks like.

gulp.task('compass', function(){
    gulp.src([sassWatchFiles])
    .pipe(plumber())
    .pipe(compass({
        config_file : 'config.rb',
        comments : false,
        css : cssDirectory,
        sass: sassDirectory
    }))
    .pipe(pleeease({
        rem: ["10px"],
        minifier: false,
        browsers: ['IE > 6', 'Firefox >= 0', 'iOS >= 0', 'Android >= 0', 'Opera >= 0']
    }))
    .pipe(gulp.dest(cssDirectory));
});

[iamvdo]

Does it work before ? What is your input file ?