Problems with post-processing

[Jibran Ahmed]

Hello,

I am following the tutorial: "How to analyze the maximum flux convergence on a tower system with one heliostat" but am not able to produce the plots in Mathematica. The tonatiuh software itself is not an issue but i am quite inexperienced at using Mathematica.

The error I receive on Mathematica occurs when i use:

rel = ListPlot[errorFluxMax, Joined -> True,

  LabelStyle -> Directive["Helvetica", 14], 
  AxesLabel -> {"Rays", 
    "Relative difference between maximum flux estimates (% of \
previous estimate)"}, PlotRange -> {All, {-5, 5}}  , 
  ImageSize -> {1000, 600}]; 
Export["TargetMFlux_error.png", rel]

it returns this error "ListPlot::argx: ListPlot called with 0 arguments; 1 argument is expected."

the term errorfluxmax returns an output of an empty matrix so i feel that this is the issue. If i define errorfluxmax as an arbitrary function then i can produce a plot. The script from the tutorial doesn't seem to be pulling the information from the .dat file.

I would greatly appreciate some help!