Using third party software within parfor loop

I wrote a set of nested for loops to conduct a parameter sweep in a third party software (Lumerical, it's an FDTD package) in Matlab. This code works perfectly well, but I can't seem to get the parallel version to work. My guess is that Matlab is having issues assigning workers in the parallel case, but I'm having issues resolving this. I've copied my code for the loop below and the line in the function I use to execute each Lumerical simulation. Does anyone have any suggestions for how to resolve this?

    parfor ph = 1:PH
      for p = 1:P
          for bi = 1:BI
              for pii = 1:PI
                  for r =1:R
                      poolobj = gcp;
                      addAttachedFiles(poolobj, FDTD_exec_pillars_parfor.m);
                      pitch = [PillarHeight(ph), Pitch(p), BackgroundIndex(bi),...
                      PillarIndex(pii), Radius(r)];
                      Transdata = FDTD_exec_pillars_parfor(pitch);
                      cellframe2(ph,p,bi,pii,r) = Transdata;
                  end
              end
          end
      end
  end

 % Path used to execute simulation in FDTD package within function FDTD_exec_pillars_parfor
 [x1,y1]=system('"C:\Program Files\Lumerical\FDTD\bin\fdtd-solutions.exe" -run NOMAD_script.lsf');

error message:

"Error: MATLAB cannot determine whether "FDTD_exec_pillars_parfor" refers to a
function or variable.
See Parallel for Loops in MATLAB, "Unambiguous Variable Names"."

This error message appeared after I added the two poolobj lines in attempt to resolve this error:

 "An UndefinedFunction error was thrown on the workers for 'FDTD_exec_pillars_parfor'.
  This might be because the file containing 'FDTD_exec_pillars_parfor' is not
  accessible on the workers.  Use addAttachedFiles(pool, files) to specify the required
  files to be attached.  See the documentation for 'parallel.Pool/addAttachedFiles' for
  more details.

Caused by:
    Undefined function 'FDTD_exec_pillars_parfor' for input arguments of type
    'double'"

Answer 1

[Walter Roberson]

addAttachedFiles(poolobj, 'FDTD_exec_pillars_parfor.m');

You were missing the quotation marks.

[Dags]

Wow, after all that debugging. Thank you! That one hurt.