Nextflow issue

[msrashid21]

hi I was trying to run this on nextflow

#!/usr/bin/env nextflow
nextflow.enable.dsl=2

params.str = 'Hello world!'

process splitLetters {
  output:
    path 'chunk_*'

  """
  printf '${params.str}' | split -b 6 - chunk_
  """
}

process convertToUpper {
  input:
    file x
  output:
    stdout

  """
  cat $x | tr '[a-z]' '[A-Z]'
  """
}

workflow {
  splitLetters | flatten | convertToUpper | view { it.trim() }
}

But then got the error:

N E X T F L O W  ~  version 22.06.0-edge
Launching `null` [sharp_archimedes] DSL2 - revision: d9253a5507
Script compilation error
- file : /Users/maisharashid/Desktop/tutorial.rtf
- cause: Unexpected character: '\' @ line 1, column 2.
   {\rtf1\ansi\ansicpg1252\cocoartf2580
    ^

1 error

I am not sure what the typo is I am doing.

[jorgeaguileraseqera]

which editor are you using to write the script? the file must be a plain text file and it seems you are using a rtf file format

[msrashid21]

I am using textedit. Also tried script editor. neither one of them worked.

[jorgeaguileraseqera]

can you attach the file instead of copy paste, please? I would like to inspect if it contains some hidden chars