Hi all, I have a cwl workflow where step1 outputs an array of items file. In step 2 I would like to add a file or an array of files to the array that is output from step1. Here is my example workflow:

cwlVersion: v1.0    
class: Workflow    
requirements:
 - class: ScatterFeatureRequirement
 - class: StepInputExpressionRequirement
 - class: InlineJavascriptRequirement

inputs:
  file1: File[]
  file2: File[]
  input_added_in_step2: File
  string_input: string_input
steps:
  step1:
    run: step1.cwl
    scatter: [file1, file2]
    scatterMethod: dotproduct
    in:
      file1: file1
      file2: file2
    out:
      [output_array]
  step2:
    run: step2.cwl
    in:
      input_array:
        source: step1/output_array
        valueFrom: $(self.concat(inputs.input_added_in_step2))
      string_input: string_input
    out: [output_array_and_file_added_and_rename]
outputs:
  output_array_plus_file:
    type: File[]
    outputSource: step2/output_array_and_file_added_and_rename

The biggest issue here is that the workflow actually runs to completion, but it doesn't ever add input_added_in_step2 to the array created by step1. It just returns the array created by step1 with the string addition.

Thanks