Logstash CSV

I am trying to import a csv with logstash but am not able to import my records(documents). Do not know what I am doing wrong. Do not receive any error messages. Settings: Default pipeline workers: 8
Pipeline main started.

input {
file {
path => ["/ES/LS/WB.CSV"]
type => "core"
start_position => "beginning"

filter {
csv {
columns => ["orderid", "orderdatum", "ordertijd", "verkoopintern", "werknemer", "klantnummer", "klant", "artikelnummer", "maat", "productnaam", "artnrlev", "kleur", "merk", "groep", "soort", "leverancier", "seizoen", "aantal", "inkoopsprijs", "prijs", "verkoopprijs", "regeltotaal", "btw", "korting", "kassakorting", "wisselgeld", "opmerking"]
separator => ","

output {
elasticsearch {
action => "index"
hosts => "localhost"
index => "logstash-%{+YYYY.MM.dd}"
workers => 1

This is an extremely common problem that people are having. Please see my response here: Logstash not indexing the input data to elastic search