# Mutate function not working (Logstash 6.2.4)

**URL:** https://discuss.elastic.co/t/mutate-function-not-working-logstash-6-2-4/129067
**Category:** Logstash
**Created:** [April 23, 2018, 9:22am UTC](https://discuss.elastic.co/t/mutate-function-not-working-logstash-6-2-4/129067 "2018-04-23T09:22:19Z")
**Posts on this page:** 1
**Showing post:** 17

<div class="post-metadata">

### Author: ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)
#### Post date: [April 23, 2018, 2:21pm UTC](https://discuss.elastic.co/t/mutate-function-not-working-logstash-6-2-4/129067/17 "2018-04-23T14:21:32Z")

</div>

> file {  
> path =\> "C:/Users/Desktop/test1///Erreurs/\*.csv"  
> start\_position =\> "beginning"  
> }

You know that this configuration won't cause the file to be read every time you run Logstash, right? The `start_position` option only matters the first time an input file is seen. Read what's said about sincedb in the file input documentation.

---

_[View the full topic](https://discuss.elastic.co/t/mutate-function-not-working-logstash-6-2-4/129067)._