Error: -16 Access Denied on xPc Target

I am trying to create a file to run a batch of tests saving the resulting .DAT file from the File Scope each time. What I have found is that the .DAT file is created on the first run but subsequent runs aren't able to access it to overwrite the data involved meaning i get the data from the original test saved multiple times. Have included my code below, I believe the problem lies with the SIHS.dat file being opened but not closed.

widths=[0.1 0.3 0.5 0.7];
frequencys=[10 50 200 30];

rtwbuild('SIHSBatch');
fsys=xpctarget.fs;

for n=1:4
    num=num2str(n);
    exp=strcat('Qloss',num);

      setparam(tg,0,widths(n));
      setparam(tg,1,frequencys(n));

      tg.start

      while strcmp(tg.Status,'running')
          pause(0.05)
      end

      h=fsys.fopen('SIHS.DAT');
      data=fsys.fread(h);
      fclose('all');
      eval([exp '=readxpcfile(data)']);
      filename=strcat('Qloss',num2str(n),'.mat');

      save(filename,exp);

end

Answer 1

[Rajiv Ghosh-Roy]

You are correct in guessing that the file is not closed properly. You need to change the fclose call in

     h=fsys.fopen('SIHS.DAT');
     data=fsys.fread(h);
     fclose('all');

to

fsys.fclose(h)

[Nathan]

Rajiv, thank you for your answer, I have tried that and it produced an error. However I found that when i moved:

fsys=xpctarget.fs;

inside the loop the fclose function worked and thus the other code did as well.