diff --git a/steps/LoSoTo.Plot.cwl b/steps/LoSoTo.Plot.cwl
new file mode 100644
index 0000000000000000000000000000000000000000..cf10f8e6213b2e98ef31ce17db4bf6eccd6648dc
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+++ b/steps/LoSoTo.Plot.cwl
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+#!/usr/bin/env cwl-runner
+
+class: CommandLineTool
+cwlVersion: v1.0
+id: losoto_plot
+
+doc: |
+  This operation for LoSoTo implements basic plotting WEIGHT:
+   flag-only compliant, no need for weight
+
+
+
+requirements:
+  InitialWorkDirRequirement:
+    listing:
+      - entryname: 'parset.config'
+        entry: |
+          soltab = $(inputs.soltabs)
+          [plot]
+          operation = PLOT
+          axesInPlot = $(inputs.axesInPlot)
+          axisInTable = $(inputs.axisInTable)
+          axisInCol = $(inputs.axisInCol)
+          axisDiff = $(inputs.axisDiff)
+
+
+baseCommand: "losoto"
+
+arguments:
+  - $(inputs.input_file)
+  - parset.config
+
+hints:
+  DockerRequirement:
+    dockerPull: lofareosc/prefactor-ci:master
+
+inputs:
+  - id: input_file
+    type: File
+  - id: soltabs
+    type: string[]
+    doc: "Tabs to plot"
+
+  - id: axesInPlot
+    type: string[]
+    default: []
+    doc: |
+      1- or 2-element array which says the coordinates to plot (2 for 3D plots).
+  - id: axisInTable
+    type: string
+    default: ''
+    doc: |
+      the axis to plot on a page - e.g. ant to get all antenna’s on one file.
+  - id: axisInCol
+    type: string
+    default: ''
+    doc: |
+      The axis to plot in different colours - e.g. pol to get correlations with
+       different colors.
+
+  - id: axisDiff
+    type: string
+    doc: |
+      This must be a len=2 axis and the plot will have the differential value
+      - e.g. ‘pol’ to plot XX-YY.
+    default: ''
+  - id: NColFig
+    type: int
+    default: false
+    doc: |
+      Number of columns in a multi-table image. By default is automatically
+      chosen.
+  - id: figSize
+    type: int[]
+    default: [0,0]
+    doc: |
+      Size of the image [x,y], if one of the values is 0, then it is
+      automatically chosen. By default automatic set.
+  - id: markerSize
+    type: int
+    default: 2
+    doc: |
+      Size of the markers in the 2D plot. By default 2.
+  - id: minmax
+    type: float[]
+    default: [0]
+    doc: |
+      Min max value for the independent variable (0 means automatic).
+  - id: log
+    type: string
+    default: ''
+    doc: |
+      Use Log=’XYZ’ to set which axes to put in Log.
+
+  - id: plotFlag
+    type: boolean
+    default: false
+    doc: Whether to plot also flags as red points in 2D plots.
+
+  - id: doUnwrap
+    type: boolean
+    default: false
+    doc: Unwrap phases.
+
+  - id: refAnt
+    type: string
+    default: ''
+    doc: |
+      Reference antenna for phases. By default None.
+  - id: soltabsToAdd
+    type: string
+    default: 'null'
+    doc: |
+      Tables to “add” (e.g. ‘sol000/tec000’), it works only for tec and clock
+       to be added to phases.
+  - id: makeAntPlot
+    default: false
+    type: boolean
+    doc: |
+       Make a plot containing antenna coordinates in x,y and in color the value
+        to plot, axesInPlot must be [ant].
+  - id: makeMovie
+    default: false
+    type: boolean
+    doc: |
+      Make a movie summing up all the produced plots.
+  - id: prefix
+    type: string
+    default: 'losoto.plot.'
+    doc: |
+      Prefix to add before the self-generated filename.
+  - id: ncpu
+    type: int
+    default: 1
+    doc: Number of cpus, by default all available.
+
+outputs:
+  - id: output_plots
+    type: Any[]